I have one small correction. To quote El Jison: "at the end of the video [I} said that the observed wavelength changes when the source is stationary but the observer moves. That is incorrect. The distance between wavefronts (the observed wavelength) does not change in this case. However, because the observer is moving towards or away from the source of the sound, the frequency (and hence, the pitch) of the sound will increase because the observer will pass more wavefronts during the same amount of time than if both the source and the observer were stationary. The opposite is true when the observer is moving away from a stationary source, the observed wavelength is the same as the rest wavelength, but the frequency (and pitch) decreases because a fewer number of wavefronts (peaks) pass the moving observer when moving away from the source of the sound. This is easier to see with a picture/diagram with the moving concentric circles. If you consider the wavefronts moving outward from the stationary car, ... the wavefronts are not compressed. However, If the observer moves towards the car they will pass more wavefronts per unit time and hear a higher frequency while observing the same wavelength." Sorry about that and thank you El Jison!
@gunnarg58
2 жыл бұрын
If the wavefronts are closer together in the observers reference frame , the wavelength in that frame of reference is less.
@GopanNeyyar
5 ай бұрын
When the observer approaches the source of the sound, can't we say the relative velocity of the sound increases and correspondingly the apparent frequency of the sound, the wavelength continuing unchanged ?
@cherrywolf759
4 жыл бұрын
Im just here cause of school my teacher sent us this and a worksheet
@donaldgreene1819
3 жыл бұрын
Same
@cherrywolf759
2 жыл бұрын
@@namangupta2214 jisd and this was 2 years ago people are still going to school at home
@sarthaksrivastava8031
3 жыл бұрын
This is an underrated channel!! Hope this gets recognition...
@sokmunitinn7468
4 жыл бұрын
i came here after the episode of the big bang theory, AND BOY THIS GUY LOOKS LIKE LEONARD
@FlippingPhysics
4 жыл бұрын
I do not see the resemblance.
@arnav4174
3 жыл бұрын
It’s as if Leonard went homeless and became a poet
@ayette8618
3 жыл бұрын
I think Doppler effect got more known in the general population thanks to Sheldon from Big Bang, and is it just me or this guy looks like Leonard in the same show?
@sohafatima4043
3 жыл бұрын
I was confused if Leonard from bbt started a KZitem channel because of his character 😂
@teja7986
3 жыл бұрын
I'm awed by thinking of the effort which goes into the making of these videos. Great work Mr. P and thank you very much, the visualizations and demonstrations made me understand the concept better. Also all the other demos about waves were so useful.
@zakiatabassum9549
4 жыл бұрын
I'm new to this channel but your videos are the reason im surviving physics in undergrad right now. Thank you for the hard work!
@FlippingPhysics
4 жыл бұрын
Good to know. Best of luck in undergrad!
@Puh539
4 жыл бұрын
Because of practical I can understand easily Thank you so much From India
@FlippingPhysics
4 жыл бұрын
That is the reason for all the practical demonstrations.
@Orion-hk4op
3 жыл бұрын
I'm here from The big bang theory, Sheldon dressed up as the Doppler effect and I was wondering what it was, Thanks!
@cjstevens8984
4 жыл бұрын
Lol, was rewatching Big Bang Theory and they mentioned this in one of the videos. Since we have not ,or more likely, will not cover it in GCSE double science, I obviously did not know what it meant. I searched up briefly to try understand it and am now trying to make sure I understand the key aspects of it and make sure they register in my mind properly. Thx, this is a good video for me to gain a better level of understanding on the subject.
@jconnell62
4 жыл бұрын
comment 3: really love that you showed a constantly expanding sphere from where the source was when it was emitted!!
@FlippingPhysics
4 жыл бұрын
Thanks! I was glad to be able to show that.
@obulesuchalla7503
3 жыл бұрын
My physics sir showed it to our class.....
@1900kk
4 жыл бұрын
Any1 here from bivens
@eljison
3 жыл бұрын
Great video and demonstration. One small correction, at the end of the video you said that the observed wavelength changes when the source is stationary but the observer moves. That is incorrect. The distance between wavefronts (the observed wavelength) does not change in this case. However, because the observer is moving towards or away from the source of the sound, the frequency (and hence, the pitch) of the sound will increase because the observer will pass more wavefronts during the same amount of time than if both the source and the observer were stationary. The opposite is true when the observer is moving away from a stationary source, the observed wavelength is the same as the rest wavelength, but the frequency (and pitch) decreases because a fewer number of wavefronts (peaks) pass the moving observer when moving away from the source of the sound. This is easier to see with a picture/diagram with the moving concentric circles. If you consider the wavefronts moving outward from the stationary car, rather than the moving car @2:51 in your video, the wavefronts are not compressed. However, If the observer moves towards the car they will pass more wavefronts per unit time and hear a higher frequency while observing the same wavelength.
@FlippingPhysics
3 жыл бұрын
Cool. Thanks for the information. That makes a lot of sense. Wish I could fix the video...
@eljison
3 жыл бұрын
@@FlippingPhysics Easy enough just to state it in the notes. Your videos are great teaching and learning tools. It is important for students to see that even "experts" make mistakes and occasionally say something incorrectly. Keep up the great work! I'm going to keep linking your videos even in my face-to-face classes.
@FlippingPhysics
3 жыл бұрын
@@eljison Thanks for the suggestions. I have pinned a comment to the KZitem video and put it also on my webpage. Basically it is just a quote of what you said, because you said it so eloquently. Thanks again!
@eljison
3 жыл бұрын
@@FlippingPhysics Awesome! It takes a huge amount of humility to accept correction online in this day and age. Kudos for that. Physics has a way of keeping some of us humble. Unfortunately, it also has the opposite effect on some others. I know how hard it is to make consistently good content as you have done, especially in video format. Then to have some "random dude" come on and "nit-pick" some seemingly minor point. However, that is what we do as educators. Getting it right is more important than our personal egos. I wish that I had the patience and your "mad editing skills" to make my own video series, but it seems pointless when there is already a series this good. Very well done!
@FlippingPhysics
3 жыл бұрын
Thanks. Imagine putting all of your lectures online and having them watched 11 million times. I have learned a lot... Oh, and, Einstein played the violin to destress. We play guitar. Must be a physics teacher thing. 😬
@sregorgamsa4810
4 жыл бұрын
Absolutely love your videos!! This would have had helped me on my last year’s exams, although, it’s really nice to study the topic again in a more entertaining look :)
@FlippingPhysics
4 жыл бұрын
Glad you are continuing to learn!
@arpit9134
2 жыл бұрын
TRULY AMAZING this has made me understand , what my teachers were never capable of making me understand . PRACTICAL knowledge enhances theoritical knowldege thanks a lot
@FlippingPhysics
2 жыл бұрын
You are welcome!
@SAMATB
4 жыл бұрын
Sir , your way of explaining is outstanding . Your videos are excellent . Have you written any research papers on Physics ?
@FlippingPhysics
4 жыл бұрын
Thanks for the kudos! No, I have not written any research papers on Physics. I am just a lowly high school physics teacher. 😀
@SAMATB
4 жыл бұрын
Sir , I have formulated a theory in Physics . Is there any way in which I can tell you the theory .
@triple7marc
4 жыл бұрын
@@SAMATB What is your theory? I'm interested.
@SAMATB
4 жыл бұрын
Sir , I am also very much interested to tell you my theory . But , could we talk about it somewhere else ?
@ilariacalzia1976
3 жыл бұрын
Great video! How did you create those animations?
@Gopal-lq5rm
4 жыл бұрын
Thanks alot Sirrrrrr...... 🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳From India... Sir
@FlippingPhysics
4 жыл бұрын
You are very welcome!
@MyBlueZed
2 ай бұрын
This would have been way cooler if you had used a Corvette. 🤣🤣❤️🇦🇺
@TomHendricksMusea
2 жыл бұрын
What happens when the wave, say an electron, approaches the speed of light?
@thehealingrealm
9 ай бұрын
so I have my vocals in this effect. I was wondering if the beat had to be the same or can I just leave it as is
@srilankanbob2179
3 жыл бұрын
Thank you so much sir triple gem bless you love from srilanka
@jconnell62
4 жыл бұрын
Comment 2: I thought that when the observer is moving the wavelength is not changed but the relative speed of sound is changed (u'=u+v)
@FlippingPhysics
4 жыл бұрын
From what I have learned, it has always been the observed wavelength and observed frequency are changed.
@anonywamy
4 жыл бұрын
It would be inconsistent to say that the relative speed of sound has changed because that implies that only one component (wavelength or frequency) could change while the other remains constant. But, as demonstrated in the video, BOTH the wavelength and the frequency change inversely. So that's why we don't say that the relative speed changes :)
@dineshbhagtani
3 жыл бұрын
Thank you posting this wonderful video.
@FlippingPhysics
3 жыл бұрын
Glad you enjoyed it
@jennlovesderby
4 жыл бұрын
Wow this is phenomenal content! Thank you for sharing this. I watched multiple videos, but this one finally clicked for me to understand it. The visuals were really helpful.
@FlippingPhysics
4 жыл бұрын
So glad to help you learn!
@charliepeterson8397
2 жыл бұрын
i was showing my friend what the doppler effect is so i looked up "doppler effect animation" on google and clicked on the first result. my mind was blown when i looked at this video and see that you are in the skyline parking lot, where i used to go to school. turns out youre a teacher at community who is also involved in theatre, and i used to be involved in theatre at skyline. what are the odds.
@FlippingPhysics
Жыл бұрын
Pretty small. Quite fun. Thanks for sharing.
@Killer_Kovacs
Ай бұрын
The shorter wavelength produces more heat?
@dadakhalindar7149
2 жыл бұрын
Do any one know the methods to record infrared frequency
@KitsuneFyora
2 жыл бұрын
The teacher's shirt looks like a Doppler effect lol
@anubhabjha6632
3 жыл бұрын
Hey buddy thank you so so so so so much.... For making me understand this man.. I love you sir
@FlippingPhysics
3 жыл бұрын
Happy to help!
@thiagodogremio
2 жыл бұрын
Ótima explicação!!!! Obrigado
@tishyamoulick293
4 жыл бұрын
That was the first video I saw on your channel. It is simply awesome and great. The animations were great. Loved the way you explained. Will surely share this to my friends.Keep up the good job.
@FlippingPhysics
4 жыл бұрын
Thank you so much 😀
@The_Dragon_Tiamat
4 жыл бұрын
This is amazing.
@FlippingPhysics
4 жыл бұрын
Thanks!
@chamathkalasandi2329
4 жыл бұрын
Really helpful . got the concept clearly .thank you!!
@FlippingPhysics
4 жыл бұрын
You are very welcome!
@latesh2471
4 жыл бұрын
Doubt 3: can you kindly explain to me the sphere mathematically?like Let's say £ is lambda or the wave length So *£'= (v-u/v)£* £'=>apparent wave length v=>velocity of sound in air u=>velocity of source🚗 moving away from the observer 🎅
@a.m.l9681
2 жыл бұрын
I want flipping physics t-shirt What's the procedure?
@FlippingPhysics
2 жыл бұрын
flippingphysics.com/shop.html
@ZX_Dev.
5 ай бұрын
i am the fourth hidden student
@mariakellis4514
Жыл бұрын
Thanks! I recently heard about the doppler effect and your video is helping me understand it.
@teddyish8914
Жыл бұрын
damn this aint english to me
@phenomenalphysics3548
4 жыл бұрын
Please make a video explaining sonic boom
@FlippingPhysics
4 жыл бұрын
It will be a long time before I make that video. It's not a part of the curriculum I am currently working on. I do have this in-class lecture video about it though: kzitem.info/news/bejne/mX2e155oZqebnqg
@So.expensive
4 ай бұрын
best explanation so far
@sajjadansari9821
3 жыл бұрын
Thank you so much sir.
@cartoonzone6125
3 жыл бұрын
Thnx it was really helpful. I understand it very much
@neyvickzallescardenas5327
4 жыл бұрын
Nice..... We know you are using 440 frecuency... Is there a mathematical way to detect frecuency if we didnt knew you were using 440 profesor? (no native english speaker sorry for my grammar)
@FlippingPhysics
4 жыл бұрын
Thanks.
@brunoalbuquerque334
3 жыл бұрын
very good and didatic. Hugs from Brazil :)
@purtavekhur4867
2 жыл бұрын
i enjoyed this toooooooooooooooooooooooooo much!
@FlippingPhysics
2 жыл бұрын
Glad you enjoyed it!
@sangeetabhatia1807
4 жыл бұрын
Sir will you be covering tge whole jee portion of phy if yes by when?
@FlippingPhysics
4 жыл бұрын
Yes. But it is going to take a really long time. I've been working on these videos for more than six years...
@alittlepigeon3647
9 ай бұрын
legend
@FlashyLight
4 жыл бұрын
Babylon 5 brought me here
@gunnarg58
2 жыл бұрын
I really enjoyed this video - it made me laugh, and also was really informative
@FlippingPhysics
2 жыл бұрын
Wonderful combination
@daffuffu
4 жыл бұрын
Im so hungry nd i just wanna eat breakfast but i gotta watch this 7 min video first
@FlippingPhysics
4 жыл бұрын
How was breakfast?
@sydneydwoskin4950
4 жыл бұрын
the different socks ahahhahahahahahhaha
@samanthacarriero9871
3 жыл бұрын
Thanks so much!!! I was so confused when my prof explained this but this makes tons of sense
@FlippingPhysics
3 жыл бұрын
Great to hear!
@the__saksham
2 жыл бұрын
hello sir can i use the animation part of video in my video?
@FlippingPhysics
2 жыл бұрын
I am sorry, however, no. You are welcome to link to my KZitem video, however, you cannot use my animations in your video.
@the__saksham
2 жыл бұрын
okayy :D can i then know, how did you animate? would help me a lot.
@FlippingPhysics
2 жыл бұрын
Adobe Illustrator: Lots of circles of various sizes. Final Cut Pro: Overlaying those circles to make motion.
@the__saksham
2 жыл бұрын
@@FlippingPhysics thank you very much
@jlpsinde
3 жыл бұрын
really amazing see you on Patreon
@krishu_rj05
3 жыл бұрын
Very good explanation
@jconnell62
4 жыл бұрын
Comment 1: important to note that when car is moving the speed of sound is the same (some are confused when comparing to a situation where a wave enters a new medium and the frequency stays the same but speed changes causing a change in wavelength)
@FlippingPhysics
4 жыл бұрын
Interesting, in my experience student's generally do not make that mistake. Thanks for pointing that out.
@carultch
2 жыл бұрын
From this idea that frequency stays the same during media changes, one might wonder why we identify light waves by wavelength rather than frequency. For instance, 750 nm red light becomes 500 nm when it passes through glass, but its 400 THz frequency is constant as long as there's no Doppler effect. It doesn't automatically become green light due to a wavelength change to the free space wavelength of green light, since it is the frequency gives it an identity as red light. The reason is that after radio waves and microwaves, most of the EM spectrum is beyond our capacity to practically measure its frequency directly. It is a lot more practical to measure wavelength for IR, visible, UV, X-rays, and gamma rays, which is why we identify the waves through wavelength.. Diffraction allows us to measure wavelength, whereas for frequency, we don't have signal processors fast enough to keep track of Terahertz.
@boboganbobogan9297
3 жыл бұрын
You do not know how THANKFUL I am for you!!!
@FlippingPhysics
2 жыл бұрын
😁
@wolfgang9190
3 жыл бұрын
Great explanation. Thanks!!
@FlippingPhysics
3 жыл бұрын
You're welcome!
@latesh2471
4 жыл бұрын
Okay, though sir when the *source is stationary* 🚗 how does the wave apparent wavelength change for the *obsever🎅(in motion)* ? [Time stamp: 7:07] What I'm trying to say here is the concentric circles should not change, having the same centre and thereby not changing the distance between consecutive circles(spheres aka wavefronts).
@anonywamy
4 жыл бұрын
I think its like this: When you are moving towards the car, You're going to run into crests more frequently hence increasing the observed frequency. And when you are travelling away, then you're going to hit lets crests as they have to catch up to you, decreasing the frequency. Not sure if that's true but its the way that I understand it.
@Puh539
4 жыл бұрын
Best video
@snehababu8775
3 жыл бұрын
really good class
@eulersfollower7140
4 жыл бұрын
Your video explains the topics in a interactive way,I'm pretty new to this channel,U r one of the reason for students go for physics in undergrad including me,pls continue ur work sir. Love from India..🇮🇳
@FlippingPhysics
4 жыл бұрын
I will do my best to continue my work. Please do your best to find ways to increase the visibility of my channel in India. That would help me out quite a bit!
@eulersfollower7140
4 жыл бұрын
@@FlippingPhysics sure
@adrianosantiago7968
3 жыл бұрын
Awesome video!!
@yosefdiriba182
4 жыл бұрын
I like men tanku
@DJTRM
4 жыл бұрын
why is why?
@AyalaMrC
4 жыл бұрын
I am so glad we don't need to calculate those anymore!
@FlippingPhysics
4 жыл бұрын
I am assuming you are referring to the fact that AP Physics 1 does not require students be able to do any Doppler Effect calculations. Personally I miss teaching the calculations. I think it made it more understandable.
@AyalaMrC
4 жыл бұрын
@@FlippingPhysics it always irritated me that the expressions were different for the source or observer being the one who was moving.
@anupam6239
4 жыл бұрын
Hello can you please make a video on elasticity and fluid mechanics??
@FlippingPhysics
4 жыл бұрын
Sorry, however, it is going to be a long time before I make videos on those topics. They are not a part of the curricula I am currently working on.
@anupam6239
4 жыл бұрын
@@FlippingPhysics no problem sir i enjoy your all videos 😊
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