Khan Academy
Introduction to the Doppler Effect. Created by Sal Khan.
Watch the next lesson: https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/doppler-effect/v/doppler-effect-formula-for-observed-frequency?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Missed the previous lesson? https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/standing-waves/v/standing-waves-in-tubes-part-2?utm_source=YT&utm_medium=Desc&utm_campaign=physics
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La explicación más sensata y detallada que he recibido …
Gracias
First time I watched this video was 7 years ago when I was in elementary school trying to learn physics. Physics looked so fascinating to me back then. Now I am watching this as a college freshman studying sociology while learning physics as a requirement for science classes. What a strange cycle.
can someone please help me out here it looks what this is trying to say is if the source advances 5 meters per second to the right that means that one second ( before 1 second) the source was 5 meters to the left and at this time created a wave surrounding it( circle) with the source ( in this case the dot being in the center) but then also kinda of moved along in its own wave that it created ?
At 3: 39 using pebble drop as an example for longitudinal waves(sound) is incorrect. Although I get the thought behind it; the fact is, longitudinal waves traverse in the same direction as the force applied whereas the waves created by a pebble drop traverse in a perpendicular direction to direction of the application of force.
im confused about the picture on the right
This is very well taught. Good Job !!
how is this "intro"
You are better than my teacher
this was very helpful
this was very helpful
this explained everything thank you!
You are really awful at making people understand
great video!!!!!!!!!!!
understood everything
really confusing
Got confused….are there 2 cases??
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Thank you that was useful
umm… I'm a bit confused in the video you said the source was moving 5m towards the right then why are we shifting the source towards the left plz explain me this why are we going back in time? and how can a crest be circular? isn't it like half of a sine wave?
Unable to understand anything
the video sucks.bullshit
Nice Video, Sir!
all of your videos are nice, so this comment doesn't make much sense, though. 🙂
can you please tell about your hardware you used to make your videos? and what software is this?? please tell 🙂
Thankyou soo much sir you are great.
this would be confusing to some, especially the part where ut seem to be that the wave increases as the source moves away from the observer
amazing i finally understand this. thank you
This beginning of the explanation is incorrect. The frequency of the waves should be increasing with respect to the observer we are moving to.
"But he wasn't here 1 second ago" lol get r3kt
Thank you so much for this video! I wasn't able to completely understand the Doppler Effect.Or well, I couldn't understand why people said that when an object is moving towards you, the waves get closer. Thanks to this video now I understood everything. Thank you!
Please help point out where im wrong 🙂 I really do want to know
With regards to all waves other than light.
The doppler effect makes us ignore our understanding of basic relativity does it not?
Isn't this much easier explained as, the car is moving forward towards us, as the wave is. Speed of wave initial + Speed of car = Speed of wave @ us.
v=fλ, f=v/λ. Simply, since the wavelength is not changing (λ), but v (speed of the wave) is due to the speed of the car relative to us, we hear a higher frequency. Why does the doppler effect complete ignore this? Why does it make up a sort of compressing/stretching phenomenon that is exceptionally misleading, when by the time we learn the doppler effect, we've most likely already been educated on relativity, which I find explains what is happening sufficiently. Please point out where i'm wrong, this has been a very hard concept for me to understand because I believe it to be a fundamentally flawed explanation for SOUND waves.
Why are we going back in time with the one on the right? I don't understand this
Good presentation
Unable to understand this video, why frequency is remaining constant..
Somebody HELP!!!
Why is the wavelenth constant, as we move away or toward, the frequency will change, why doesn't the wavelength change too ? where V=Wavelength x Frequency
I was expecting you to say "bye pitch, bye frequency". 🙁
Good video, totally understandable
This was great. Thanks