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mananvpanchal
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View attachment relative_doppler_effect.bmp
The image shows four points. "A" is source of light and "B" is receiver, and "a" and "b" represents co-ordinate points.
"A" is moving with constant speed to "B". "B" feels doppler effect.
If "B" moving with constant speed to "A", then also "B" feels doppler effect.
Statement 1: This two situations seems identical.
We can imagine "A" as sound source and "B" as sound receiver.
If "A" is moving with constant speed < sound speed to "B". "B" feels doppler effect.
If "B" is moving with constant speed < sound speed to "B". then also "B" feels doppler effect.
Now, suppose the situation where speed of "A" or "B" > sound speed.
Imagine, that "A" coming to "B" from far beyond "a" with grater speed then sound speed. B is situated at point "b".
when "A" reaches to "a", "A" starts producing sound, but sound cannot reach to "B" before "A".
In another situation "B" coming to "A" from far beyond "b" with grater speed then sound speed. "A" is situated at point "a".
When "B" reaches to "b", "A" starts producing sound, but now situation is different then before. "B" can receives sound before "B" reaches to "A".
So, the change in speed differs the identity of situation.
So, the situations ( < sound speed ) also weren't identical, it seems that those were identical.
Here is something which stops situations to be identical. Medium of wave. The air.
In first situation "A" is moving relative to medium, but in second "A" is stationary to medium.
We cannot create the same situation with light, since nothing can travel faster than light.
But, there is SOMETHING in which light travels.
And if "relative to medium" can change outcomes, then is the "Statement 1" right?
The image shows four points. "A" is source of light and "B" is receiver, and "a" and "b" represents co-ordinate points.
"A" is moving with constant speed to "B". "B" feels doppler effect.
If "B" moving with constant speed to "A", then also "B" feels doppler effect.
Statement 1: This two situations seems identical.
We can imagine "A" as sound source and "B" as sound receiver.
If "A" is moving with constant speed < sound speed to "B". "B" feels doppler effect.
If "B" is moving with constant speed < sound speed to "B". then also "B" feels doppler effect.
Now, suppose the situation where speed of "A" or "B" > sound speed.
Imagine, that "A" coming to "B" from far beyond "a" with grater speed then sound speed. B is situated at point "b".
when "A" reaches to "a", "A" starts producing sound, but sound cannot reach to "B" before "A".
In another situation "B" coming to "A" from far beyond "b" with grater speed then sound speed. "A" is situated at point "a".
When "B" reaches to "b", "A" starts producing sound, but now situation is different then before. "B" can receives sound before "B" reaches to "A".
So, the change in speed differs the identity of situation.
So, the situations ( < sound speed ) also weren't identical, it seems that those were identical.
Here is something which stops situations to be identical. Medium of wave. The air.
In first situation "A" is moving relative to medium, but in second "A" is stationary to medium.
We cannot create the same situation with light, since nothing can travel faster than light.
But, there is SOMETHING in which light travels.
And if "relative to medium" can change outcomes, then is the "Statement 1" right?
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