3 minutes in and anyone paying some amount of attention would understand polarization, great contribution, the internet is pleased.
@skaramicke
4 жыл бұрын
4:30, understanding destroyed
@anitachoudhary8019
3 жыл бұрын
@@skaramicke 🤣🤣🤣
@nassimhadjbenali3819
6 жыл бұрын
How people dare to dislike such a video when that much effort is put in. Thanks a lot !!
@parameshwarhazra2725
3 жыл бұрын
That's is KZitem's fuckin algorithm
@owlredshift
Ай бұрын
Less than 0.03% of views disliked this. What are you even on a tiff about?
@A.n.a.n.d.k.r.
6 жыл бұрын
Better than my 1 hr physics class
@CriticalMonkey623
3 жыл бұрын
I just came across the 3D glasses example kinda by accident, and the more I experimented the more confused and perplexed I got. After watching a bunch of videos and still feeling slightly disappointed by their explanations I came across this one. This was expertly explained and your demonstrations helped a ton. I love youtube videos from the earlier days, always the purest content.
@tarunpratapsingh5276
6 жыл бұрын
Your practical examples really quenched the trust.....! No theory can clear the things in such a intresting way ☺
@deepjyotidas5762
10 жыл бұрын
That is a very beautiful demonstration involving day to day experience making it comparatively easier to understand the whole polarization concept. Good job Kevin..!
@ahuna1
5 жыл бұрын
YOU NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOB BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
@uploadJ
5 жыл бұрын
So many presenters on YT get the 3-polarizer explanation wrong, but, you got it right!! Congrats.
@rmenchoachupicachu
10 жыл бұрын
Thanks a bunch, im in Electricity,Magnetism & Optics right now and next monday is my final. This is a great explanation of Malus Law!
@curiash
5 жыл бұрын
~one of the most coolest way to understand polarized light~
@vishvasharma8495
3 жыл бұрын
Wonderful way to express the idea of polarisation. I like your practical approach, thank you.
@videoloverme
9 жыл бұрын
Very lucid elegant explanation. Thanks a lot Mr. Kevin.
@manasaacharyulu3905
6 жыл бұрын
Sir we were just to take off our heads to put this topic into our head. U just showed us what exactly it is....thank you...
@Peeeacee
10 жыл бұрын
splendid teaching...........thanx a lot!
@mohamadali2066
Жыл бұрын
Best demonstration of polarization I've seen!
@troy-z3q
6 ай бұрын
Fate. Hirata, Pillars of light, Eyes of Wisdom, Fate. Crow and Declaration, Between front and back, Imaginary Technique, Hollow Purple
@SirCharles12357
8 жыл бұрын
Best demonstration of polarization I've seen! Thanks for taking the time to demonstrate it. Also, I've read that there is a theory that turtles are able to find new bodies of water to migrate to by being able to see the polarized light reflecting off the water. Can you explain how this is possible? Thanks
@arazick
8 жыл бұрын
Good job Kevin! Thanks for making this Video. I am having a problem with my progressive prescription polarized sunglasses. While I am driving, each time I look at the navigation screen, I tend to tilt my head slightly to the right to look at the screen, and when I do the light from the screen is blocked and I can't see it. I didn't have this problem with my old clip-on sunglasses that I used to clip on to my old progressive prescription glasses.
@johnnyswatts
7 жыл бұрын
The colours in the Petri dish arise because the plastic is birefringent, meaning that it has not one but two polarisation axes each with their own index of refraction. The polarised light is resolved into two perpendicular waves which travel at different speeds through the plastic. The parts of these two waves that are parallel to the analyser interfere, producing interference colours much like those seen in a slick of oil on the surface of a puddle or in soap films.
@ondermetu
2 жыл бұрын
Videonun bilgiyi aktarım kalitesine bayıldım. Thank you for this much effective way delivering this concept at this much of ease. Demonstrations are so valuable
@StairwayToAsgard
8 жыл бұрын
Nice vid! Why exactly are different parts of the sky reflecting a variety of polarisations?
@lekunberriko1
10 жыл бұрын
Thanks so much, Kevin. Greetings from Spain.
@june756
3 жыл бұрын
Wow really thanks for the video. Very useful and informative video. I just wonder how amazing nature is
@noahway13
8 жыл бұрын
You have the mind of a teacher. Good job.
@Dragon195ana
9 жыл бұрын
Thank you very much!!! I only wanted to see an animation but a real life experiment is more helpful :D
@puneetsharma8168
4 жыл бұрын
100 times better than my Indian rote learning education system
@tpsnewslivenow9473
4 жыл бұрын
Thanks for clearing my concepts on this topic, From India
@prudencechi2235
3 жыл бұрын
Thank you so much Kevin 👏👏👏👏 Quick Question: Is there a difference between an Analyzer and polarizer?
@fromexoplanet21
2 жыл бұрын
Thank you for these awesome demonstrations👏👏💖
@agiladoo
4 жыл бұрын
Nice experiments, can you tell me what kind of flashlight is that?
@johnwilliams-qn8mx
11 ай бұрын
Man this explains so much things, bro I gotta thanks you what an amazing video
@Tin9102
5 жыл бұрын
nice, thank you for the enlightening ^^ I was looking for that exact simple explanation
@JohnDoe-wi6nq
Жыл бұрын
Best video on polarisers. Thanks a lot.
@onnoadriaanse4598
9 жыл бұрын
Hi Kevin, great video! Thanks a lot for sharing how to show this effect. Just to be sure, you now place the polarization filter in front of your cameralens. But do you also see the colors when you just look with your eyes through the polarization filter? And is the petri dish you are using a glass or plastic one? Can I use it to see the stress in a glass of wine for example?
@shakshyamkafle5876
3 жыл бұрын
what a brilliant demonstration
@skaiyzn3398
7 жыл бұрын
sweet. I was wondering about those 3D glasses for a long while now. I used to have tons of fun popping the lens out and watching it change colour as I turned them in front of each other. So since it lets light come in differently from each side, that makes sense why it's not recommended to wear them as sunglasses. XD
@artisticnoob5003
4 жыл бұрын
Really made the topic more intresting! Loved it!!
@ameliabuns4058
Жыл бұрын
so it's like a slope and movement? going forward with a wall in front of you gets you stopped, but if you put a gradual slop to change directions it'll change the direction to up? (no gravity etc)
@suryansh2022
7 жыл бұрын
Where can i get those linear polarising filters?
@tanveersingh8290
5 жыл бұрын
Great video man you explained every concept of polorization with examples in one video.
@gailbarlow8958
7 жыл бұрын
That was great! I wish I had found it before. Thank you very much Kevin.
@gbityunan
9 жыл бұрын
Very well explained, thank you! At the very end when the light is reflected off the mirror, is it blocked by the linear polarizer or the circular one?
@KevinClaytor
9 жыл бұрын
Good question, let me explain in words and then try a diagram as well. After the, say, left-circular (LC) polarized light is reflected from the mirror and becomes right-circular (RC) polarized. The 'circular' polarizer, isn't actually just a circular polarizer. It's a quater-wave plate (1/4-wave plate). This transforms the RC light to linear polarized. But it's polarized 90-degrees to the linear polarizer it encounters next. So the linear polarizer ultimately blocks the light. Here's an attempt at a diagram: Incoming light (arrows show direction of light - read from right to left): | No light out ^mirror
@crcaccounts
Ай бұрын
What does it get darker when the two filters are place together with the axis aligned ? Shouldn't intensity be the same since the polarized light is already blocked by the first filter ?
@_Fox
2 жыл бұрын
My mind was blown, thank you for that
@preetamyadav7952
3 жыл бұрын
very much thank u . I was reading stress analysis and in photoelasticity it helped me a lot
@JessieAllen-r6m
8 ай бұрын
Thanks a lot Mr. Kevin.
@impulsetones6727
4 жыл бұрын
fantastic explanation of applications ...keep it up bro
@kamathlaxminarayana301
7 жыл бұрын
Thanks a lot for this video. I find myself coming back to it occasionally. I am now curious about this behaviour at 4:35 . 1) Why does this behaviour occur at all? 2) Is there any name for this behaviour that I can lookup on the net?
@uploadJ
5 жыл бұрын
Re-radiation. It's "re-radiation" of the light energy (EM wave) at a new polarization angle. Take a look at the vid below- the metal grate is re-radiating the microwave energy in the direction that the grate is positioned, having intercepted the RF from the transmitting end at 45 degrees. So, re-radiation of the RF then takes place at the new 45 deg angle AND is picked up at the far end receiver. kzitem.info/news/bejne/rINoup-DaZqrim0&t=116 Also, this MIT demo goes into a little more detail: kzitem.info/news/bejne/ooykmm2Cm4ugdW0
@aubreyheyy
Жыл бұрын
thank you so much for your explanation. very helpful!
@jeff35372
7 жыл бұрын
Great explanation, Now I can apply my 3D glasses to microscopy.Thanks.
@kamathlaxminarayana301
10 жыл бұрын
That's a neat explanation! (a) So how are these polarizing filters made. How do they work? Are there millions of tiny slits? Is it made of some chemical or crystal? (b) Why is the interaction so consistent all over the filter? Are there materials man made or otherwise where polarization is not consistent? (c) Do diamonds show polarization?
10 жыл бұрын
(a) they are made in molecular level.
@KevinClaytor
9 жыл бұрын
a) In a way they are - they're typically polymer chains, such as PVA, that are pulled during manufacturing. When they're pulled, all of the chains line up in one direction. The electrons are then free to move along the polymer, but not transverse (90-degrees) to it. This allows the polymers to absorb the light that is polarized along the direction of the polymer, and let the other polarization pass through. There are some other ways of making polarizers - metal wires can be used for lower frequencies (the spacing of the wires has to be less than the wavelength. This is really close for red, 800nm, light, but not so bad for microwaves). Some of the most efficient polarizers use two pieces of glass precisely joined together. These only work for a certain 'viewing angle' though. b) Our eyes can be pretty sometimes - they're capable of detecting single photons in very low-light situations. But they're also not always the best relative detectors. I'm not sure what the relative consistency over the filter is, but it's probably less than 5%. Also, I'm sure the manufacturer has experimented in the best ways of making consistent filters, and have implemented quality control measures to make sure that they're mostly consistent. If not, they can always re-melt and re-stretch the polymers for another batch. c) I'm not aware of any bulk optical polarization in diamonds. This doesn't surprise me much, as the crystal structure is a tetrahedron and is fairly isotropic - unlike the clearly directional pulled polymer filter. Of course, the faces of the diamond do reflect light, and you can get polarization when viewing reflections (from any surface, glass, water, diamond) at the Brewster angle. Unfortunately, I forgot to touch on this topic in the video.
@memoriislife9046
4 жыл бұрын
Real life explanation wow..simple but powerful
@ShreevallabhKulkarni29
9 жыл бұрын
that was a smooth learning curve.. gr8 video.. Thank you :)
@pavankalyan-vf3jg
7 жыл бұрын
awesome explanation.👌
@HKAngne
9 жыл бұрын
You made polarization so much more fun for me! Thankyou!
@consideration8881
Жыл бұрын
no words can express my appreciation than I love you hhh
@5ty717
Жыл бұрын
How does the “repolarization” alluded to at ~6.00 because to that point i see polarization filters are removing photons in proportion to sine theta…
@sanjaykumar-sz9eb
7 жыл бұрын
awesome explanation . amazing. Before watching this video I thought polarisation as topic I could never be able to understand but now I am curious about it. thanks 😘
@cslloyd1
2 жыл бұрын
how do you explain polarization in terms of photons? We're told light is a particle. Can a particle/photon be polarized?
@حفيدالفاروقعمر-ص9ر
8 жыл бұрын
perfect explanation, but i think that the expression for the sun light polarization is due to the difference between the plane of polarization of the aye and that of polarizer
@KevinClaytor
8 жыл бұрын
That's incorrect. The human eye is not sensitive to the polarization of light. This is why we need eg, the analyzer to view the polarized stress in the plastic cup. Bee eyes are another matter.
@rabeyaallah
8 жыл бұрын
That was so helpful to understand the polarization in an interesting way thanks
@ashjosh_ajj
5 жыл бұрын
Brother what is that glass ur using for the rotation
@question42
5 жыл бұрын
Fabulous vedio !!! Thanks kevin sir For doing this experiment.
@chleung6110
6 жыл бұрын
Why the 3D glasses change the colour of the light apart from its polarisation?
@djmesterolof
7 жыл бұрын
very good job! this will hopefully help me with the understanding for my electromagnetics exam next week :)
@husseinalsalman3146
4 жыл бұрын
We're in 2020,i wanna ask u, did u pass the exam?? ☺️☺️
@kunalsauravsinha7603
4 жыл бұрын
You nailed it in our understanding. Thanks 😊
@calvevgaming752
7 жыл бұрын
How come when you overlap the second polarizer with the same axis as the first one, it dimmed the light slightly?
@guachiano
10 жыл бұрын
Great explanation, thanks for upload this kind of useful videos. It helped me a lot to learn about this subject matter.
@nishik1152
5 жыл бұрын
Sir which material consist that polariser please tell..
@stephaniemurano114
3 жыл бұрын
excellent examples ! i commend you
@ryanwong772
6 жыл бұрын
Just an aswm explanation.....Very clear concept.....Just amazing......😍😍😍❤Aswm job brh!!!....Keep making videos like this.....I reaply love it.....
@ryanwong772
6 жыл бұрын
Its really not reaply😂
@justindeutsch3851
3 жыл бұрын
How did you make the index cards? I am a teacher and I think that would be great for the students to do !
@june756
3 жыл бұрын
We can buy it online.
@justindeutsch3851
3 жыл бұрын
@@june756 Where?
@alberoDiSpazio
9 жыл бұрын
repolarized? I see it, but I don't buy it. You're saying that the sandwiched filter is 'changing' the polarity of the light wave?
@KevinClaytor
9 жыл бұрын
Yes, it does - but in the case of the sandwiched filter it comes at a cost. The filter blocks some of the light, reducing the overall brightness.
@papalevies
9 жыл бұрын
***** I had the same question. The key to understanding this is that a diagonal vector has horizontal and vertical components! So what the middle filter does isn't bending the light but rather allowing the horizontal or vertical components (according to the middle filter's direction of axes) through. The sunglasses at the end do the same thing.
@celiogouvea
8 жыл бұрын
I think it's not a linear wave like people demonstrate, it's a three dimensional field. I believe that all fields pass through even if we don't see the light. I think the polarized glass change the shape of the field making it invisible through our eyes and the other glasses reshape back to normal somehow.
@HarshRajAlwaysfree
5 жыл бұрын
5:25 I still don't understand how did the intensity increased ? I mean in polarisation, I2 = I1 (cosx)^2 So intensity should have decreased But it increased ? I don't think it should have been possible in an isolated system
@channelx8257
5 жыл бұрын
It became polarised at a diff. angle that's why it regained the intensity, as it no longer made 90° with the sunglasses & the 2nd polariser.
@yehonatangiz3450
7 жыл бұрын
How does polarization support the model that light is an electromagnetic wave?
@aayushkhandelwal4912
5 жыл бұрын
Today i took one specs from 3d movie theatre and i found that both the sheets present on specs are polarized screen i took one sheet out and saw through it from changing its angle from one face it seems to become yellow and blue and from other SIDE NOTHING happened as its now become plan polarized. After that i put that one sheet on other sheet present on other side of specs when i put it and start rotating it changes intensity as I/2 and when i putted that sheet on other side i saw that it makes rainbow effect which is in high intensity and when i started rotating it other colors coming so how that is working . And ya i have one more polarized screen which i took out from my old button nokia phone and results are different this time it only changes intensity no color effects . Plz explain
@zahidhasan9040
3 жыл бұрын
Thanks a lot, learned a lot in 15 minutes
@charleshines6155
5 жыл бұрын
I notice that with some phones polarized sunglasses will often block the light.
@Paralianpoet
7 жыл бұрын
still doesn't explain why my room projecting outside building with colours and movement. I just wanted to know why I see the building with its original colours on my wall. I know it somehow being projected from my window but I'm just curious.
@solapowsj25
3 жыл бұрын
Glow array of spherical photons get pole arrayed or polarized via certain crystals. Tensors.
@fenerbahce262
9 жыл бұрын
Hi there, thanks for your demonstration, however at 6:07, you polarise them horizontally and than you use your sun glasses which are polarised vertically, how can you go light, from the horizontal, the intensity should be zero.
@KevinClaytor
9 жыл бұрын
Good spot! This is an example of the extinction ratio. This is the ratio of the unwanted to the wanted light. So a ratio of 1:10 would mean that for every 10 photons of light you want (horizontally polarized in this case), 1 of vertically polarized light makes it through. You can also think of this as a fraction; 1/10 (I think this is more useful as we can just multiply with it). (To be even more confusing, some people write this ratio the other way; 10:1) An extinction ratio of 1:10 is pretty bad, but probably about right for my cheap pair of sunglasses. The square polarizers are better, so let's say that they have an extinction ratio of 1:500. What does this do for the light that we see in the video? The light that makes it through to the camera has to make it past both. So here's the breakdown of what happens (V = vertical, H = horizontal). Light source: Initially unpolarized light a 1:1 mix of V and H. Let's use the numbers; 500 V and 500 H. First polarizer: This is set to allow H light, but the extinction ratio is 1:500, so for every 500 H, we still get 1 V (or we just multiply the light by the extinction ratio: 500 V * 1/500 = 1V). We now have; 1 V and 500 H. Second, square polarizer. This is set to allow V light to pass, But the extinction ratio is still 1:500, so some H light makes it (again, 500 H * 1/500 = 1H). So the camera 'sees'; 1 V and 1 H. Only 2 units out of the 1000 we put in. That's pretty good, we can round that down to 'zero'. What happens if we replace the second polarizer with the (not so good) sunglasses: After first polarizer: 1 V and 500 H Second, sunglasses: These have an extinction ratio of 1:10, so the amount of H light that makes it is 500 H * 1/10 = 50. So the camera 'sees'; 1 V and 50 H This is 50x larger than the previous case! Which, is exactly the difference in extinction ratios; 1/10 / 1/500 = 50. But it gets worse if you have two bad polarizers! Here's the math replacing both polarizers with sunglasses: Starting with: 500 V and 500 H After first (H sunglasses): 50 V and 500 H After second (V sunglasses): 50 V and 50 H So now we've let through 100 units of light total, double the previous case! This is why if you're shopping for polarizers one of the numbers you'll see is the extinction ratio. Typical cheap lab polarizers are in the 1:500 or 1:1000 range. Really good lab polarizers are in the 1:100,000 range!
@alberoDiSpazio
9 жыл бұрын
fenerbahce262 What are you asking?
@dalinelio333
4 жыл бұрын
Please teach us about ND filters, this is something amazing.
@Ceonsamea
9 жыл бұрын
Cool video, thanks for the explanation and demonstrations!
@esraatalal7197
4 жыл бұрын
Really thanks to you but i want some more about circularly polarized light istill haven't get the hole idea
@kumarshubham4327
4 жыл бұрын
Excellent explanation.
@CarolinaArteagaLasso
10 жыл бұрын
Thank you very much for making this video. It was pretty easier for me to understand than other videos. Keep it :D
@muhammedtalhayasar6687
3 жыл бұрын
Very instructive.
@danielrozanski9594
3 жыл бұрын
Great explanation
@ghanshyamsahani9442
7 жыл бұрын
if light has a electrical field then why we not sock .plese answer me
@devanshtrivedi3905
3 жыл бұрын
Thank you sir, I am very grateful
@phillipnewman9174
4 жыл бұрын
Truly fascinating!
@Anonymous-pq4mr
5 жыл бұрын
The BEST video ever
@siyona_saruparia5343
7 жыл бұрын
that was a really nice demonstration ! tysm
@李均-p4i
9 жыл бұрын
great job,now a will be able to tell if sun glasses genuine or not
@electrowizard2658
Жыл бұрын
excellent explanation
@Jewish_Israeli_Zionist
2 жыл бұрын
This is high quality ASMR
@morotoo
Жыл бұрын
you are a great man, thanks!
@apotter8888
4 жыл бұрын
Thank you!! That was very interesting and very informative!
@VivianaVillanuevaPicolini
10 жыл бұрын
Like a boss!!!! Thank you!!! Greetings from Argentina.
@akhpanday9201
6 жыл бұрын
Viviana V k🍧
@slowthriller
Жыл бұрын
Saw a video where the two opposing lenses nothing gets through light changed the look of certain gems to lots of colors and different geometric patterns. I think quartz was one. (Edited) Found it. I don't know how to paste a link but the video is called 12 foundation stones of new jerusalem. It's 2 yrs old only has about 6k views. I forgot this video says some gems like diamonds look black in different light. Why have i never heard of this? Wife and daughter are into rocks, me too. This is interesting.
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