The Doppler Effect explained visually

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ScienceClic English

ScienceClic English

Күн бұрын

A concise visual explanation to better understand the physics behind the Doppler effect.
For more videos, subscribe to the KZfaq channel : / scienceclicen
And if you liked this video, you can share it on social networks !
To support me on Patreon : / scienceclic
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Alessandro Roussel,
For more info: www.alessandroroussel.com/en
_
To learn more :
en.wikipedia.org/wiki/Doppler...

Пікірлер: 77
@MolecularMachine
@MolecularMachine 3 жыл бұрын
I saw a picture of a red bumper sticker that said, "If this sticker is blue, you're going too fast."
@OpRaven-62
@OpRaven-62 2 жыл бұрын
Brilliant.
@mamdoohal-nassirat1627
@mamdoohal-nassirat1627 2 жыл бұрын
reddit comment
@Mariouigi
@Mariouigi Жыл бұрын
@@mamdoohal-nassirat1627 had to translate as I don’t know what that meams
@hizon525
@hizon525 Жыл бұрын
@@Mariouigi it's not from another language. Reddit is a social media platform. The person is saying that the comment is something you'd see on that website
@FaZekiller-qe3uf
@FaZekiller-qe3uf Жыл бұрын
@@hizon525 r/wooosh. they know that, KZfaq detects it as another language and presents a translate button.
@physicslover1950
@physicslover1950 3 жыл бұрын
Please make another video on relativistic Doppler effect and abberation of light.
@samtauzin4757
@samtauzin4757 2 жыл бұрын
I’m sure you’re a big fan of his new black hole videos 😁
@physicslover1950
@physicslover1950 2 жыл бұрын
@@samtauzin4757 yes a little... That video was good at tha end. .
@TiberiusMoon
@TiberiusMoon 3 жыл бұрын
Haha I just have this image of singer frantically running at you to reach a high note.
@MrIrrepressible
@MrIrrepressible 3 жыл бұрын
U hsve a God given gift for teaching.
@geraltdelautreriv
@geraltdelautreriv Ай бұрын
A who?
@sourabhrajput3234
@sourabhrajput3234 3 жыл бұрын
No one has ever explained this concept so easily... I'm impressed buddy!!! Cheers from India!!😊
@Bociukaz
@Bociukaz 3 жыл бұрын
Nice channel, very nicely explained. Would be grate if you explain how can stars move from us at more than speed of lite. We see it in doppler effect, however the main explanation is that space it self expands. If space itself expands, than our measurement unit of length expands too, meaning that wavelenght does not change, why then we see redshift?
@teddp
@teddp 2 ай бұрын
Finally I get the Doppler effect! It is worth mentioning that the speed of both sound waves and light does not change, only their perceived frequencies.
@mnada72
@mnada72 3 жыл бұрын
What I liked in your animation is using the blue an red color
@MaxHackbarth
@MaxHackbarth 6 ай бұрын
I wish that there was the explanation of sonic booms in this as well but all in all it is still a very well made video from a very under appreciated channel
@xrxnpop1222
@xrxnpop1222 3 жыл бұрын
Simply amazing , explained very well thanks
@3dgar7eandro
@3dgar7eandro 5 ай бұрын
Very nice explication: easy to understand for everyone 🤓👏👏👌👌
@crewrangergaming9582
@crewrangergaming9582 3 жыл бұрын
Underrated channel but we want longer videos too 😁
@Jimbodawg
@Jimbodawg 3 жыл бұрын
..but not if they can be explained as shortly and concisely as this video does. I hate when channels make videos that take 8 minutes to begin a 1 minute explanation.
@Legatron17
@Legatron17 2 жыл бұрын
This is probably the best explanation of how sound waves work when movement is applied to the source I could've ever hoped for, the illustrations really, and I mean REALLY helped me understand how it all made sense, the illustrations were so good in fact, that I could've probably watched this video without sound and still understand everything. While this may not be a popular video of yours, I can say that it's one of the most understandable and best illustrated videos you have put out, so don't get discouraged by the view count and keep up the awesome work! Visualization should always be just as important as the script itself :)
@shabbataishabba9363
@shabbataishabba9363 10 ай бұрын
Sound is a lot slower then radio, i have no clue why radio has a doppler effect since they travel faster then the rotation of the earth. Why would someone "behind" me receive radio in another frequency then someone "infront" of me ??? i mean 300.000 km/h .. With sound i can understand, but not with radio since it is so much faster. I have no clue why sat's change frequency when overflying. But i do know something is fishy
@thomasboissier7163
@thomasboissier7163 4 жыл бұрын
Excellent, ça rend vraiment super bien !
@ScienceClicEN
@ScienceClicEN 4 жыл бұрын
Thanks !
@StudywithmeinPakistan
@StudywithmeinPakistan 4 ай бұрын
Very well explained. Great
@drcubix
@drcubix 2 жыл бұрын
You're INCREDIBLE
@yuutsu4232
@yuutsu4232 3 жыл бұрын
Great videos, but I think you should put some equations for people who are interested in physics/mathematics, at least in the summary of the video
@Tomnedreb
@Tomnedreb 3 жыл бұрын
That make perfect sense!
@Dr.RiccoMastermind
@Dr.RiccoMastermind 2 жыл бұрын
Thank you for the quick video, but please, could you answer mw the question why we can assume that the Doppler effect if spundwaves is directly comparable with the red shift of light waves (besides similar effects)? Physics should be vary different between a big pile of air molecules and quantum-electromagnetic waves or a pile of photons?? How can the energy jn the frequency of light be changed by rather slow moving radiating objects? And is it all the same cause of red shift for relatively moving objects, for light throug expanding space and for light in a gravitational field?
@dampuawang2897
@dampuawang2897 3 жыл бұрын
always simlpy amazing
@tempestlizard7075
@tempestlizard7075 4 жыл бұрын
Wow ça fait bizarre de t'entendre comme ça mais bien joué c'est hyper compréhensible !
@ScienceClicEN
@ScienceClicEN 4 жыл бұрын
Merci ! Mais la voix est celle d'un ami qui me fait les traductions ;) Mon accent n'est pas si bon ^^
@knightgabriel4018
@knightgabriel4018 4 жыл бұрын
nice ! Thx for this video
@ScienceClicEN
@ScienceClicEN 4 жыл бұрын
Glad you liked it !
@karl7225
@karl7225 3 жыл бұрын
How are you doing your incredible animations? Is there a certain programm?
@anim8dideas849
@anim8dideas849 3 жыл бұрын
probably adobe animate
@wannabeactuary01
@wannabeactuary01 4 жыл бұрын
Great video - it has got me thinking. Human beings can only detect frequency? Can they detect wavelength? And I suppose what is wavelength? I think I have forgot all the physics I learnt at school.
@ScienceClicEN
@ScienceClicEN 4 жыл бұрын
Wavelength and frequency are related, detecting one would be similar to detecting the other. The frequency of a wave is the rate at which it oscillates in time, whereas its wavelength is the physical distance that separates two peaks. The wavelength and the frequency are related by the speed of the wave, for example for light, wavelength * frequency = speed of light. When we hear a sound, we detect frequency, as the sound waves vibrate in our ears which send the vibrations to our brain as an electric signal.
@gregggo
@gregggo 3 жыл бұрын
​@@ScienceClicEN I wish you'd be my teacher when I was younger. I keep watching your videos and it's astonishing how well explained everything is along with these visualizations. Your explanations are better than any other KZfaq science channel I've seen. Other YT channels very often cut corners, omitting certain explanations which leaves me with some questions unanswered, or doing bad visualizations which can make someone confused and force him to backtrack his logic. Keep it up, and your channel may become super popular once it gains enough momentum, I'll definitely share it with others!
@ScienceClicEN
@ScienceClicEN 3 жыл бұрын
Thank you very much, indeed I think visuals are almost as important as the explanations they are supposed to illustrate. Thanks for sharing that helps a lot !
@Bociukaz
@Bociukaz 3 жыл бұрын
@@ScienceClicEN If universe expands, wave length with it, and if eye detects waveleght, we should not see redshift. means we are detecting frequency. This question bothers me very long
@ScienceClicEN
@ScienceClicEN 3 жыл бұрын
Well as you say, if the universe expands, wavelengths increase, so we detect a change in wavelength : redshift. The key point is that our eyes do not expand, and in particular the way we detect wavelengths / frequencies is not affected by the expansion of the universe
@lokefinnutselv7848
@lokefinnutselv7848 Жыл бұрын
Nyyyyyyooooommmmmmm ! (the sound of a motorbike passing) Thanks for great videos =)
@marianmusic7221
@marianmusic7221 3 жыл бұрын
@ScienceClic English If the speed of light is constant (it does not change), wouldn't be normal to not have the doppler effect in the light domain? Thanks for all the great videos!
@Interceptor
@Interceptor 3 жыл бұрын
This is an effect on the frequency of the wave (i.e. how far between each wavetop), not the speed at which the wave propagates. It happens because the "emitting" object is moving towards/away from you while emitting new waves, not because the wave itself is moving faster/slower after having been emitted. :)
@Abdullah.A.Almasri
@Abdullah.A.Almasri 6 ай бұрын
Thanks ❤
@Gabarel13
@Gabarel13 4 жыл бұрын
Et maintenant en anglais ! Continue, tu mérites grave tes abonnés !
@ScienceClicEN
@ScienceClicEN 4 жыл бұрын
Merci chef !
@bactid
@bactid 3 жыл бұрын
Why do waves compressed when moving toward something and stretched when moving away from something? Tried searching for it but never seem to get the answer.
@ScienceClicEN
@ScienceClicEN 3 жыл бұрын
It's because as the wavefront propagates away from the source, the source moves towards / away from it, so when the next wavefront is emitted, it's slightly closer / further from the first wavefront
@bactid
@bactid 3 жыл бұрын
@@ScienceClicEN Thanks. Great channel.
@reyzavala
@reyzavala Жыл бұрын
On the Earth is sound vs air. With galaxies is light vs vacuum. How do we know is the same effect? Or we are just assuming?
@wannabeactuary01
@wannabeactuary01 2 жыл бұрын
Another question - at what speed can the human eye see/detect the doppler effect on earth (eg a car driving past)? And other animals?
@acajoom
@acajoom 9 ай бұрын
Watch Light and Dark with Jim Al Khalili it will answer many such questions 🙂
@6v318
@6v318 2 күн бұрын
Oooh the red shift and bbt
@benmountfort
@benmountfort 10 ай бұрын
If subject A moves slightly closer to subject B and then stops - it isn’t in a forwards motion towards subject B then shouldn’t just be the same as the original?
@acajoom
@acajoom 9 ай бұрын
In that case the frequency changes back to the initial yes.
@-ksewlay7531
@-ksewlay7531 4 жыл бұрын
So, are the color relative ?
@ScienceClicEN
@ScienceClicEN 4 жыл бұрын
Yes in a way, the energy of a wave (hence the color that we perceive when it comes to light waves) depends on our velocity with respect to its source.
@Dr.RiccoMastermind
@Dr.RiccoMastermind 2 жыл бұрын
@@ScienceClicEN Thank you for the quick video, but please, could you answer mw the question why we can assume that the Doppler effect if spundwaves is directly comparable with the red shift of light waves (besides similar effects)? Physics should be vary different between a big pile of air molecules and quantum-electromagnetic waves or a pile of photons?? How can the energy jn the frequency of light be changed by rather slow moving radiating objects? And is it all the same cause of red shift for relatively moving objects, for light throug expanding space and for light in a gravitational field?
@projectmagnet
@projectmagnet 10 ай бұрын
If the light has the same velocity to both people, then how come the doppler shift changes its color?
@shabbataishabba9363
@shabbataishabba9363 10 ай бұрын
@2.53 Radio is a lot faster then sound
@simondavid11
@simondavid11 Ай бұрын
Does NOT "progressively" become lower pitch, that is completely wrong. The pitch changes suddenly, when the source passes the observer
@ScienceClicEN
@ScienceClicEN Ай бұрын
The change happens quickly but it is still progressive. And it's all the more progressive the further we are from the road. That's because the formula for the received frequency is f' = f/(1+xv/(c√(x²+D²))), where f is the emitted frequency, v the speed of the car, c the speed of sound, x the position of the car along the road, and D the distance from us to the road. The more D increases, the more this curve is progressive. You can try varying the parameters here : www.desmos.com/calculator/brc4m7t4ct
@oki8445
@oki8445 2 жыл бұрын
this is why a hellcat whine is so terrifying
@deathxunnat4693
@deathxunnat4693 3 жыл бұрын
Anything is interesting as long it's not in your syllabus
@roccofitel8970
@roccofitel8970 3 жыл бұрын
Heres my problem with the doppler effect. That means that entire Galaxy...the whole ass thing as a unit Must be moving unbelivably fast in some given direction. Further more if light travels at the same speed how on earth can ANYTHING be red or blue shifted? We don't have multiple cells for hearing sound. We know that it's not just an illusion of perception. The frequency of that light MUST be changing. Because the cells in our eyes are being activated by that specific frequency of light. The doppler effect would make more sense if galaxies appeared BRIGTER or DIMMER.
@Jimbodawg
@Jimbodawg 3 жыл бұрын
light is not simply black or white as it exists on a spectrum that allows us to observe the expansion of the universe and without it we may have never been able to theorize red and blue shift as it would be much more difficult to detect the distance of objects in space based upon their luminosity.
@scptime1188
@scptime1188 2 жыл бұрын
What? The galaxy is redshifted and blue shifted because the frequency of the light gets longer or shorter. Why would it affect the amplitude?
@jaze_ph
@jaze_ph Жыл бұрын
so this is what Sheldon Cooper's supposed to be...
@bokjedegeus3798
@bokjedegeus3798 3 ай бұрын
unfortunately the explanation is wrong. It is not the frequency that changes but the wavelength.
@pranshupruthi6992
@pranshupruthi6992 16 күн бұрын
But if the velocity remains the same then frequency should also change, right?
@WadcaWymiaru
@WadcaWymiaru 3 жыл бұрын
Video LACK the core of explanation do... *dislike* Why Doppler Effect happen in the first place? Two things: - emission of light/sound in time is fixed - the speeed of light/sound is also fixed This is WHY moving objects are causing both higher and lower frequences, which are denser and less frequent waves.
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