Doppler Effect Explained: What Is It?

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The Doppler Effect describes the change in frequency of a wave in relation to an observer moving relative to the source of the wave. It involves both a decrease in frequency as a sound source moves away and an increase as it approaches. The discussion also touches on the effects of the Doppler Effect on atoms and photons, suggesting a complex interaction as they move towards one another. Length contraction is mentioned as a factor that affects the perception of space during these interactions. Overall, the conversation highlights the need for further exploration and understanding of the Doppler Effect in various contexts.
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I know its to do with the drop of frequency when the object that is making the noise passes you, but what exactly is it? I don't know much about it.
 
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DrPhy said:
I know its to do with the drop of frequency when the object that is making the noise passes you, but what exactly is it? I don't know much about it.

not just the drop in freq, but also the increase in freq as the object is moving towards you

Anyway reading Doc Al's link should clarify things for you

Dave
 
Does anyone know much about how atoms are effected by the Doppler effect as they move...or as something moves towards them?

I've been trying to visualise it. Like as a photon approaches an atom, the atom seems flat to the photon. I've been thinking about electrons too.
 
Sounds like a separate thread there krd.
How about starting one and pinging me to reply?

Hint:
when you use length contraction - all of space gets flattened, not just objects in space.
 
Good find alextx - wikipedia also has a bunch of them.
 

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