Phil on Unmade Podcast: kzitem.info/news/bejne/wJmb3HuarYKqqKA
@aaroncameron9559
6 жыл бұрын
Id like to hear Phil talk about how the uncertainty principal relates to wireless data transfer. The faster the data rate, such as in video transmission, the more spread out the bandwidth is. Therefore you have a high loss transfer. In low data rates, you can have a tight spectrum and have lossless transfer.
@81giorikas
2 жыл бұрын
Top marks for explaining physics soundwaves with metal chugs and top marks for playing an epiphone elite with the international headstock, it's a rare guitar and it's a great one as well.
@kwgm8578
Жыл бұрын
Try this, professor: four -- eee --:eh (eh sounds like the long A sound, as in space)
@fakjbf3129
6 жыл бұрын
I think a neat description of how momentum and position are inversely related can be shown with a photograph. If you throw a ball and take a photo in mid air with a camera that has an infinitesimally small shutter time, you will have a perfectly clear picture of the ball. You will know it’s position at that moment in time with 100% accuracy, but you can’t know anything about how fast it was moving. If you take a photo with a larger shutter time, the picture of the ball will be smeared a bit. You can measure the length of that smear, and by also knowing the shutter time you can get how fast the ball was moving. But if you try and say “Where was the ball when the photo was taken?” you have to gesture to the entire smear because it wasn’t in only one spot. The trick then is showing why this example is relevant to the quantum world.
@drzl
6 жыл бұрын
You made this so easy
@KittyBoom360
6 жыл бұрын
But doesn't your ball actually still have definite positions and momentum regardless of the methods to measure them? An oscillation doesn't. Maybe if you got the ball bouncing to some rhythm and tried to locate the rhythm, then you'll see that the position of the ball is not the 'reduced' position of the oscillation. Also, the real trick is showing why quantum mechanics is relevant to the real world, not the other way around.
@fakjbf3129
6 жыл бұрын
It's an analogy, it's not "This is literally how it works". It's just a way to visualize the relationship if you have a hard time thinking directly in terms of sine waves. And no, it goes both ways equally.
@KittyBoom360
6 жыл бұрын
Well, really It only goes both ways if you're not scientific and 'believe' in QM theory.
@MuitoDaora
6 жыл бұрын
The position is absolute. You can not say that this is somewhere over there. It's like record a video of a race car, you can only find the position (absolute) with one frame, if you use all frames you can determine the velocity but can not find the absolute position. Edit: I was explaining the analogy itself and not the uncertainty of the particles.
@KamiKuzi
6 жыл бұрын
i love when professor Moriarty explains really complicated quantum physics with metal music and instruments.
@harryalexander9844
6 жыл бұрын
I think you got your Fouriers wrong. The picture you gave us is the Utopian Socialist François Marie Charles Fourier. The person he's most likely talking about is Jean-Baptiste Joseph Fourier. Two completely different people.
@tedarcher9120
6 жыл бұрын
Lol yeah. This fourier is a very boncus guy indeed
@sixtysymbols
6 жыл бұрын
Brady's bad - mea culpa!
@manfredpseudowengorz
6 жыл бұрын
hawk eye
@gregbrooks7102
6 жыл бұрын
But really, how certain can we be?
@LeftFlamingo
6 жыл бұрын
LOL
@SendyTheEndless
6 жыл бұрын
What a knowledgeable djentleman.
@AbhiBass96
6 жыл бұрын
Nice to see another djentleman...
@Pr1est0fDoom
6 жыл бұрын
Thall.
@cobblebrick
4 жыл бұрын
What a djentlemanly thing to say
@himeshviews7622
3 жыл бұрын
haha
@chrisallen9509
2 жыл бұрын
After 3 quantum mechanics courses and 3 classes going over Fourier series heavily, this is the first time I feel like I’ve deeply understood the uncertainty principle…
@denomsolis4171
6 жыл бұрын
This was more enlightening than several dozens of videos on the Uncertainty Principle that I've seen before. Thank you!
@ShadowZZZ
6 жыл бұрын
GREAT! I find it so heartwarming that dedicated and experienced scientists try to communicate their understanding with art and music to make it easier to understand for everyone!
@claritas6557
Жыл бұрын
This video is supremely important for anyone at the beginning of studying physics in university. Phil's seamless joining of Fourier transfers, wave mechanics and Heisenberg has opened a little door in my head that 'shines light' onto the information I've been studying. Bloody good job, kudos to prof. Moriarty.
@88Cardey
6 жыл бұрын
I wish I had a science teacher with the same passion and enthusiasm as Philip Moriarty when i was at school, rather than open a textbook up and read away... It would most likely have changed my career path. He's a pleasure to listen to.
@loduk102
6 жыл бұрын
I love Professor Moriarty's passion. You can feel his excitement.
@cassandravaupel7589
6 жыл бұрын
W E H V S
@otakuribo
6 жыл бұрын
S T R Y P E R
@aitch9053
6 жыл бұрын
T O M B R U H
@Dartnix
5 жыл бұрын
S P Ë H S
@ankitaaarya
4 жыл бұрын
VAFS
@ishworshrestha3559
4 жыл бұрын
Ok
@kushagrasachan8933
3 жыл бұрын
The epiphany: *One can never hear a pure sine wave. Never has, never will!* This particular phrasing, although following naturally from the explanation, actually puts it as an even more astounding realisation. Any claimed 'pure' sine wave one hears is but truncated, so it's eventually divergent from the ideal sine wave that theoretically exists in temporal infinitude! Amazing!
@voidisyinyangvoidisyinyang885
2 жыл бұрын
Only it's not true. Science has proven that humans can hear up to 10 times faster than Fourier time-frequency Uncertainty. This demonstrates quantum coherence as noncommutative phase and study Penrose and Hameroff for details.
@RMoribayashi
6 жыл бұрын
When I first became a ham radio operator the idea that a morse code signal had *_any_* bandwidth confused me. Morse code transmissions intentionally don't switch very rapidly. This minimises "splatter" to either side of the radio dial. If you increase your sending speed (let's say from 5 to 45 words per minute) without switching faster, the dots and dashes begin to run together. At faster speeds you need to switch more quickly to transmit an understandable signal. The signal becomes more complex and takes up more bandwidth. Mathematically speaking, it takes more sine waves to recreate the original signal the faster it's switched on and off.
@whatelseison8970
6 жыл бұрын
Similar restrictions exist with modulation of any kind. You can only send information at less than half of the carrier wave frequency (The Nyquist frequency).
@RMoribayashi
6 жыл бұрын
Exactly. Thanks to the net it's fairly common knowledge now but back in the 1970's it was easier to experience it in practice. Hearing some fool CBer wipe out three channels to either side while splattering across the entire band because he thought overdriving the finals of an illegal linear amplifier would give him more power will drive home the concept much better than a KZitem video.
@whatelseison8970
6 жыл бұрын
Yeah that must have been easier to understand in practice... because I have no idea what you're talking about.
@timeslowingdown
6 жыл бұрын
@what else is on think about the fourier transform from the video and how the short guitar note made a wider fourier transform than the longerone. The radio "bands" are supposed to transmit the information on a specific frequency, so whoever is listening can filter out other frequencies. Shorter / faster input would make the fourier transform wider, hence if it got too wide, other bands could get polluted. Not sure what "illegal linear amplifier" is but I guess the concept is that the extra noise it would cause outside of the target frequency when interpreted from the fourier transform would be annoying to other people trying to receive different information through nearby frequencies.
@helloimnisha
6 жыл бұрын
I am a 2nd yr undergraduate student and this cleared up all concepts of Fourier transforms. Thank you so much.
@JimGriffOne
6 жыл бұрын
For those that are interested, a true sine wave lasts for an infinitely long period of time. If it starts and stops, other frequency content is introduced and it's no longer a sine wave. The opposite of a sine wave is a Dirac spike, which lasts for an infinitely short period of time. This produces a horizontal line that rises and falls on an FFT, whereas a perfect sine wave creates a vertical line.
@chaitanyaaggarwal129
6 жыл бұрын
Jim Griffiths
@Laurenss23
6 жыл бұрын
How does a wave ‘know’ it has an end? When I have a sine wave that lasts for only 10 sec, then during those 10 sec the wave must be pure/true. If it was not and the uncertainty of the wave would be present before the cutoff, then we would have communicated information from the future. So only after the 10 sec have passed can the stop be detected. Else I could detect the stop before it happened, but then decide not to stop, thereby creating a paradox.
@JimGriffOne
6 жыл бұрын
@@Laurenss23 The sine wave, when measured as it's playing, is perfect. But it has to be measured in its entirely, otherwise it's like measuring just part of something but not the ends. There is a wide bandwidth on the start of a sine wave that quickly narrows but it never reaches a true single frequency. It always has sidebands because we aren't measuring it lasting for infinity seconds. It's the same for Dirac spikes. We can never produce an infinitely short-lived impulse because it's a mathematical concept, not a reality. The impulse would last less than a Planck length of time, just as a "perfect" sine wave has to last for infinity time to produce one individual frequency with no sidebands. Both perfect sine waves and Dirac spikes are physically impossible and we have to deal with that reality. I don't know how mathematicians deal with it, though. I'm just a sound engineer, car mechanic and KZitem commenter.
@JimGriffOne
6 жыл бұрын
@@BlazeOrangeDeer Nope. It's a perfectly flat line covering the whole frequency spectrum from zero to infinity Hz, rising and falling instantaneously.
@raykent3211
6 жыл бұрын
@@JimGriffOne you mentioned you were a sound engineer and just made me think of spike testing of acoustic environments to get data for convolving reverbs. So, yeah, the spike contains energy across the whole audio spectrum in one brief click, as you said.
@sturestensson9187
6 жыл бұрын
I know that the chance of professor Moriarty reading this is minimal, but for that small chance I would like to to express that his videos are by far the favorite for one with a bachelor in physics.
@crucifixgym
6 жыл бұрын
FFT and music pave the path to understanding reality. Metal kicks it into high gear.
@moropikkuu
Жыл бұрын
I‘m a chemistry student (albeit leaning very heavily into Prof. Moriarty‘s field of quantum effects and nanoscience etc) and I have to say: this video has had such a profound impact on my intuitive understanding of uncertainty relations and Fourier transforms. Understanding the maths is one thing, but getting an intuitive grasp of the situation, a sort of big picture on it, really really helped me put all the various maths in context. I cannot understate how much of an impact this video has had on me. More like this, please!
@ultravidz
6 жыл бұрын
We’ve got a new classic right here
@ElPasoJoe1
4 жыл бұрын
I wish I had found this when I was an undergraduate physics major. Quantum mechanics was the only grade I got less than an A. I kept waiting for them to tell me why. Years later I read QED by Richard Feynman and accepted that no one knows why. This video gave me a grasp of uncertainly (40 years after) that had been elusive. I still wonder about QM - part of retirement is that I have the time to continue to wonder on the unanswered questions...
@thequantumworld6960
4 жыл бұрын
Hi, Joe. I remembered your comment under this video from a few months back and thought you might be interested in the material for "The Quantum World" module that I'm about to start teaching. Best wishes, Philip (Moriarty)
@Porglit
6 жыл бұрын
"Particles starrt to behev like wehvs"
@leavingsoonduetocensorship3453
Жыл бұрын
Accents are tribal are disgusting because they're performative and you should speak clear and concise rather than pretending you can't
@3006spikespiegel
6 жыл бұрын
14:10 atoms, momentum and things like that, they are waves of... THE MUSIC OF AINUR
@morkmon
6 жыл бұрын
This is a really good explanation, one of the best videos yet
@MrSonny6155
6 жыл бұрын
Finally we got a Sixty Symbols video on this that actually explains uncertainty properly! The amount of time I've spent understanding this concept makes me wish this was uploaded a few years ago...
@martixy2
5 жыл бұрын
We've already had the wave explanation on Sixty Symbols. But the notion of reciprocal space and the link between frequency and momentum was mind-blowing.
@timseguine2
6 жыл бұрын
Glad you guys did a video on this. I have been saying for years that this is the easiest way to understand this.
@MohammadKhan-ls9qw
5 жыл бұрын
I normally zone out when watching most videos on Science (even if they're well made), but I have no trouble watching Sixty Symbols videos. Love this channel.
@sajukkhar
4 жыл бұрын
Nice Ok computer image
@randominternetprofile8270
6 жыл бұрын
He was and will always be my favorite professor, but I'm not even 2 minutes in and he's won my heart 🤘
@Allomerus
6 жыл бұрын
This is awesome. I will share this with my physics class. Thank you so much!!!!!
@matildawillcox1693
3 жыл бұрын
Im a Chem first year w no real physics background and I SO nearly have a comprehension of this but it keeps slipping away from me. One of the best videos I've found trying to get a handle on quantum mechanics - thank you.
@leplum2001
6 жыл бұрын
It is all but impossible to portray any aspect of quantum phenomena via the methods of language and macroscopic examples. However, in my 50 years as a nuclear physicist this is one of the best, possibly the best and well thought out examples that I have ever seen. Congratulations Mr Moriarty.
@rylace
2 жыл бұрын
Thinking about this and Tolkien lore is really cool. Turns out the real world can be thought of as being made through music in a sort of way too.
@heydj6857
4 жыл бұрын
i'm very much into music and science, the relationship between both always stuns me.
@SamitMohan
6 жыл бұрын
I'm 16 and i love this channel a lot! Wish teachers in India were like this
@ht3k
6 жыл бұрын
He has a PhD in Physics so... that's part of the reason
@nicholashylton6857
6 жыл бұрын
@@ht3k I am not sure how many cool science teachers in India also love the legendary Canadian rock band, *Rush.* But it might be a fascinating study! ☺
@glenecollins
6 жыл бұрын
samitmohan I doubt there are too many high school teachers like professor Moriarty anywhere... ...Must not make detective reference...
@SamitMohan
6 жыл бұрын
Yeah but Indian science teachers are agh.
@Triantalex
Ай бұрын
ok?
@ostapkurtash6359
5 жыл бұрын
velocity is distance divided by time. Distance is just the position1 minus position2 (the direction is irrelevant in this case), something like this: v=(r1-r2)/t. Now take the calculator and put values to r1 and r2 (position) and consider the t (time) as one defied constant. As r1 is closer to r2 you know more precisely the position, but then velocity (v) drops down. As you take more disperse values for r1 and r2, the velocity is better defined. There you go: velocity -> momentum, position->position). Just imagine yourself walking on the street and then your friend calls you asking where you are. You were just passing around the corner but by the time you said it to your friend you were actually done with the corner, because of your velocity you were less able to define your position, if you'd be less in a hurry, the information you said that you are passing around the corner would have been much more precise. Resuming: In order to have speed you must have different positions and in order to have your position you must not have velocity.
@andy16005343
6 жыл бұрын
Loved this video. The Professor's passion and enthusiasm is captivating, and I genuinely found myself understanding more about uncertainty and quanta than before. Great work all involved.
@misterbil4637
2 жыл бұрын
I envision it this way. In regards to location and momentum. A vehicle moving on a road. The more precisely that you are able to measure its location the less certain you are of its momentum.
@pinkdispatcher
6 жыл бұрын
I was lucky enough to have a physics teacher in school to show us that before I even went to university. I also like the recurring theme of "explaining physics with Heavy Metal."
@henrycgs
5 жыл бұрын
One of the things that took me the longest time to understand was that silence ALSO is a sum of sines. A lot of silence with a small bump is a very, very complicated sum of sines.
@Danilego
6 жыл бұрын
3blue1brown made an awesome video about this, except he went more for the math part with Fourier Transformations
@ffhashimi
6 жыл бұрын
Well you share the link of that video?
@MikeJSharkey
2 жыл бұрын
Best explanation on the topic I’ve ever seen.
@ThoranTheGamer
6 жыл бұрын
I'm picturing it as a square with a set area. Push one side to be thinner and the area can't change so the other side expands out. It isn't helpful with understanding which properties have this effect but it helps make sense of why knowledge increasing in one aspect inversely impacts the other.
@piccalillipit9211
3 жыл бұрын
*WOW - I understood that* I even understood how Planks Constant related to momentum and frequency - what an amazing explanation...
@3ATIVE
4 жыл бұрын
You could also run the analogy of E.G. tapping on a table. Tap it once (Short duration or Time) and you'll get [in essence] every frequency. However, if you start tapping it faster (longer Time) you'll narrow the frequency range and begin to produce a specific tone(s).
@dijonkeliodjoe
5 жыл бұрын
Been watching sixty symbols for a while think this is the best video you’ve ever uploaded
@breaneainn
6 жыл бұрын
Wow. That was the best analogy I have ever seen.
@DrDress
6 жыл бұрын
I agree with Phil. This should be taught earlier on. I first really hear it on KZitem years after I graduated
@tomaszbekas
5 жыл бұрын
Best video about uncertainty principle on KZitem
@MrJdcirbo
4 жыл бұрын
Something interesting: the plucked string presents purer frequencies, and the palm muted note requires more frequencies to describe it (thus widening the band). Yet the same hand played both notes intuitively, without considering about the math. Something creates these quantum objects effortlessly and perfectly without needing any mathematical restraint, even though we need the math to describe how it works. IDK if that is a redundant fact, but it fascinates me and speaks to the question of whether math is invented or intrinsic...
@CountElectric
6 жыл бұрын
Great presentation on a hard to conceptualize subject. Thank you very much.
@bradywells1293
6 жыл бұрын
I'm a huge fan of all the science/math channels you guys have on here -- and this is one of your best vids yet! Awesome work & great explanations.
@benoitb.3679
2 жыл бұрын
I've just noticed the title of the slide (I think)! "From Fourier to Fear Factory" haha brilliant!
@italktoomuch6442
5 жыл бұрын
So THAT'S how metal guitarists make that sound! That was almost more enlightening than the rest of the video!
@larryducie6719
6 жыл бұрын
Good vid. Lots in there - link to classical waves, Fourier transforms, wavefunctions, normalisation, complex conjugates. Really needed the minimum uncertainty though (h/4pi) to show that position can't be locked to a single point (momentum=0). This is a BIG one for explaining minimum energy states, bound states, and quantum phenomena. Good excuse to do a follow up and a chance to bring in Planck! :-)
@KittyBoom360
6 жыл бұрын
It's the same for any oscillation tho, not unique to 'quantum phenomena'.
@larryducie6719
6 жыл бұрын
Not disagreeing, and not really my point. I do think it is important to explain though - it's pretty fundamental to the uncertainty principle put forward by Heisenberg and shows it is not an infinitely sliding scale. You can never truly know the absolute exact value of any complementary variable.
@michaeljorgensen790
3 жыл бұрын
My understanding of the uncertainty principal is now less uncertain than the amount of uncertainty I had before I watched this video.
@nobblynobody
6 жыл бұрын
I'm liking the Quentin Blake style graphics
@EmanuelsWorkbench
6 жыл бұрын
Love the Rush shirt.... (says the Canadian.... ) :0)
@Mortiis558
6 жыл бұрын
Emanuel de Matos He’s a feminist AND a Rush fan, ugh could he be more wrong?
@kristopherpoulsen653
6 жыл бұрын
@@Mortiis558 Hey! Rush is great! You watch it, buddy! >.
@Mortiis558
6 жыл бұрын
Kristopher Poulsen I’m not your buddy, guy!
@justyo96
6 жыл бұрын
Mortiss558 - you may not be a fan of their music, but it's hard to deny that they're masters of their instruments.
@Mortiis558
6 жыл бұрын
justyo96 They know how to play their instruments decently. But I’ve never been blown away by anything I’ve heard.
@Craznar
6 жыл бұрын
Learned something new today about something I got taught decades ago.
@mynameisthis1580
5 жыл бұрын
Phillip said something without realizing it. He's trying to measure position of the string on a guitar, but when he uses his pick, it doesn't change the strings position, he changes its shape. When Phillip whistles, he's altering the medium of the air around him. The recorder is picking up the alteration to the air. We're trying to measure these things we call electrons/photons/etc. What if we are fundamentally incorrect in our view of what it is, and thus measuring it incorrectly? Imaging that we can only use a seismometer to measure animals. Different animals would give different readings. However, we wouldn't be able to really grasp what the animals are by only using a seismometer.
@animistchannel2983
6 жыл бұрын
It works the same in politics, economics, military, ecology, etc. Once you know the co-inverted (harmonic) principles, you can predict the relative functionalities of the systems and their probable comparative performances. Generally speaking, more complex and diverse systems are also more robust and enduring, but they are also harder to control. Likewise, highly controlled and/or heavily bounded systems are markedly more unstable. Sometimes the diametric variances over time can be juggled to some extent, but this is also a form of control that leads to further levels of instability. In the histories of societies and empires, Persia was never going to conquer the Greek city-states; and the Soviet Block was never going to overcome NATO. Within a society, free people outproduce slaves, and agnosticism erodes religions. In architecture, a building that is designed tightly in isolation will not be as functional as one that is more open and adapted to the landscape. In agriculture, mono-cropping leads to famine and collapse. In biology, predators with a single prey are more vulnerable to extinction. GI Joe used to say, "Knowing is half the battle." The weird truth is that leaving room to not-know is often the other half. This is how Lao Tzu realized that the better ruler (or manager, sage, gardener) is the one who acts "lightly." This is not philosophy. This is physics. The ability to improvise within a loose but functional framework is a key ingredient to success. It also makes the best music :)
@Ceelvain
6 жыл бұрын
It's been a long time. We need more Sixty Symbols videos!
@jlunde35
6 жыл бұрын
Best explanation of the Uncertainty Principle yet.
@Omnihil777
5 жыл бұрын
THANK YOU for these bridges, that's what makes my picture far more complete.
@JavierSalcedoC
6 жыл бұрын
Love this natural science channel, his voice has the spirit of radio and the camera eye is working, man. Couldn't get the subdivisions between the different strings and the permanent waves tho. If time stand still we'll detect mystic rhythms?
@uncertaintyto117
6 жыл бұрын
In the end, we've got to learn the lessons and track those vital signs. I do the best I can but we never get something for nothing. It all comes down to our freewill and yet we just seem to keep losing it. But then the afterimage lingers and we're left with the scars...
@sandman7955
4 жыл бұрын
This is probably the most informative 60symbol videos I watched . The way it was broke down awsome
@dougosborne3599
4 жыл бұрын
Ok. Now I'm going to buy a guitar. Excellent analogy! First time I've wrapped my head around this principle. So, thank you!
@TheWazzupDood
6 жыл бұрын
As an electrical engineering student taking signals and systems and studying Fourier systems right now, this video gives an amazing insight into the other side of physics that's more theoretical and not mathematical. 10/10.
@Land-of-reason
5 жыл бұрын
Basically you have a sinusoid function generated by the string and a 'boxcar' function created by your hand damping the string. The sinusoid causes the narrow spectral line. The 'boxcar' creates a Sinc function in the frequency domain. In essence you are multiplying two time series together which equates to convolving their spectra in the frequency domain. I expect that you already realise that. In the old day's before FFT's (N log N to the base 2 multiplications) we would run a correlator in the time domain using (rotating accumulators) and then apply a DFT (slow computationally intensive N squared multiplications) to derive an averaged power spectrum (Blackman Tookey relationship).
@tejaskulkarni5795
Жыл бұрын
What an amazing explanation!!! Best one out there ! Phil you rock !
@midwinter78
6 жыл бұрын
For chemists, our view of quantum mechanics is of standing waves of electrons around atoms that go on for basically forever, which means that their frequency - and thus their energy - is nice and sharply defined. And thus you've got something reasonably definite even if the problem of a single electron moving about a nucleus is full of quantum fuziness: "well, the probablity distribution on the position of this electron is centred around the nucleus but kinda broad, the probability distribution of the momentum is centred around "at rest" but kinda broad, but the total energy? Half a hartree". Thus we can avoid having to deal with some of the quantum mind-screws that the physicists have to deal with.
@greatmomentsofopera7170
5 жыл бұрын
This is unbelievably interesting and has real applications in my opera work. One aspect of vocal virtuosity is being able to articulate many notes in a short time, and vocal staccatos, that is notes plucked out of the air with no connection between them and the adjacent notes are considered especially challenging. Now I know exactly why. It is much more difficult to produce that exact package on frequencies with your vocal chords on a short note, than on a long sustained note. So I guess my question is, what simplifies that "package" that would make these short notes less demanding to produce? A purer/simpler fourier series. Is there a way of quantifying this mathematically, and then also aurally? It must be the case that certain sounds are easier to produce quickly than others. I guess it comes down partly to the purity of the vowel itself. Would love any input if anyone can offer any?
@AlteredBuzzard
6 жыл бұрын
I can tell this person is a great lecturer. Passionate, able to simplify stuff star trek style XD Any other person would overload my short term memory and prevent much of it going into my long term memory as the body would not be able to process such a huge amount of information.... like trying to put gravel through a sieve.
@TheZenytram
6 жыл бұрын
Everything i love in one video, math, music and Q. fisics.
@hamilpatel4025
6 жыл бұрын
this is why i absolutely enjoy this channel. fantastic video
@roystonlodge
Жыл бұрын
The best explanation I ever saw of this principle used radar to illustrate the point. Sadly, I can't find the video now.
@stevemonkey6666
6 жыл бұрын
I will have to watch this again a couple of times. I feel that this is an important video
@joegillian314
5 жыл бұрын
Let me see if I'm getting this right: The wave-like behaviors of the particles makes the location uncertain because the wave is spreading out and there's no way to tell where it originated, unless it's not moving at all in which case you can't tell how fast it's going.
@anjuro
5 жыл бұрын
That was actually really helpful, thanks
@skeletonrowdie1768
6 жыл бұрын
wow i really learned something with reciprocal space there thanks!!
@70jofo
6 жыл бұрын
The best explanation of the uncertainty principle. Well done.
@RobBaartwijk
2 жыл бұрын
it is however impossible to create a perfect square wave from loads of sine waves. You can only approximate the square wave. This by the way, is why the Yamaha DX7 synthesizer sounded so different. It was based on mixing a number of sine waves to generate any other waveform. And it could never quite make a pure square wave so it sounded different, and fantastic I might add. It was called FM which stands for Frequency Modulation and it was based on Fourier Analysis. I can recommend any keyboard player to dive into that a bit more.
@kwgm8578
Жыл бұрын
Very cool video. Phil gets very excited about physics. Brady, you are becoming a knowledgeable astrophysics/quantum physics/chemistry journalist who is asking more perceptive questions than you did a few years ago. I like the cartoons too, very much. They often humorous and ironic as well as being illustrative.
@pelimies1818
4 жыл бұрын
Slight correction: The amount of distortion has nothing to do with the length of decay; i.e. the time the string vibrates.. and that vibration produces the sound electromagnetically via pickups, and acustically via air. As long as the string moves there is a decaying sound. Your volume is high, and that makes the audible decay time longer, than played with lower volume or unplugged. But it has nothing to do with distortion, as an effect.
@wildedibleplantsofthemedit8676
3 жыл бұрын
An awesome professor
@billoddy5637
2 жыл бұрын
Great! Now, every time I see a heavy metal concert, I will instantly think of Louis de Broglie!
@vargohoat9950
6 жыл бұрын
sine sine everywhere a sine, blockin' out the scenery, breaking my mind do this don't do that, can't you see the sine
@realraven2000
6 жыл бұрын
In fast jazz solos the notes you play do not all matter - the timing is much more important base the ear will also be able to tell that easier.
@moiquiregardevideo
4 жыл бұрын
Electrical engineers have a precise explanation : they needed to know precisely the distance in hertz between each radio station. What is the effect of AM modulation on the final frequency used by the radio transmitter. A rough approximation : suppose a 1 MHz radio wave which is very pure sinusoidal, no distorsion. Now, we start modulating the amplitude with a pure sin wave of 1 KHz. The radio transmitter will occupy the range of frequencies from 999 KHz to 1.01 MHz. You can test that by detuning your radio receptor. If the modulated frequency would be 100 Hz, you would loose the radio as soon as you detune a little. But with 1 KHz, you can hear that tone while detuning up or down around the middle point.
@HalfpennyTerwilliger
6 жыл бұрын
French here, there's no need to apologize, that "Fourier" was very well said. De Broglie is trickier as it's not said as written (so even French most often get it wrong...).
@redglazedeyez6652
6 жыл бұрын
about time we had another video
@manfredpseudowengorz
6 жыл бұрын
and there's the hook: a photon has a certain energy level - after all it's an elementary particle - quantum of electromagnetic energy, it's also a wave that carries the least information possible. Its energy as a quantum has to be an exact value, and the waveshape has to be a pure single sinwave. This causes the photon to have an infitesmal length and travel in literally no time. The way we experience propagation of the light is then caused by time dillasion and space contraption caused by difference between the photon motion speed, and the ours...
@timeslowingdown
6 жыл бұрын
Yeah, very interesting thing that you can figure out by knowing that the limit of "time dilation" for something approaches the speed of light is infinite, but interesting to connect that with it being a perfect sine wave, wow.
@miki09876
3 жыл бұрын
Great illustration of an elusive concept
@ngkktht774
5 жыл бұрын
I am not sure I understand the sound analogy. I am getting sharpest possible spike in fourier analysis even for just one period, if I set the window I analyse to EXACTLY one period of the sinewave. That guitar analogy seems just wrong to me. How I see it - they were not analyzing just the wave, but the wave multiplied by decay envelopes. Those envelopes could also be considered a kind of (subsonic) waves. Fast envelope (strings blocked by palm) is like having our pure wave multiplied by a faster wave vs slow decay (not blocking strings) is like having our original wave multiplied by a slow wave. And (like in ring modulator in analog, or just multiplying samples in digital) it is known that when we multiply values of two waves with frequencies f1 and f2, the result will contain f1+f2 and f1-f2 ... and that's why it gets broader in fourier analysis, because if the note would be 200 Hz and the decay would envelope would be 1/4 of second long (so something like 4Hz) then we would get 196 Hz + 204 Hz in the result. But if the decay is 4 seconds long, it's something like 1/4 Hz and on fourier we'd see 199.75 Hz and 200.25 Hz which are closer to each other, so it seems less broad. By the way, the device which professor used in "another sound of bonding" video for transposing into audible range, is based on this same principle.
@philo3838
4 жыл бұрын
He rarely makes sense and his analogies are mostly wrong.
@Fetrovsky
4 жыл бұрын
Stryper!!!!! My most favouritest band of all timessss!!!!
@gmsherry1953
6 жыл бұрын
I'm sure this is an excellent and elegant explanation, but if I were given to doing gratitude exercises, one thing I'd count tonight is that I don't have to understand this. Not for a class, not for a test. Because he lost me at the beginning and I never recovered despite listening to some of it twice. I thought he was going for the difference between a guitar sound and a whistle (in harmonic complexity) but he wasn't (so why bring it up??). He was saying a short guitar note has ... a less defined frequency than a long one? How can that possibly be? Their mix of frequencies is the same!!! OTOH, Fakjbf's comment example of a photo of a moving object makes PERFECT sense, but I have a feeling it's not what Prof. Moriarity was aiming at. He wanted frequency to have something to do with it, and a moving ball doesn't HAVE frequency. Or maybe it does. I have no idea anymore.
@richardjanowski7219
4 жыл бұрын
Awesome video. Deep ideas, but still accessible.
@bellybooma
6 жыл бұрын
This is valuable insight that students paying thousands at universities can't even get. Thank you,
@unknownPLfan
6 жыл бұрын
So is Moriarty also a metal guitarist? He was already my favorite in the 60 symbols lineup and that'd make him so much better.
@Martymer81
5 жыл бұрын
Brilliant explanation. It pisses me off that introductory QM textbooks can't put it this way. At least none I've ever read.
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