The doppler effect is applicable for
Light waves
Sound waves
Space waves
Both A and B
It occurs in light and sound both.
Doppler Effect -
When a source of sound and a listener are in motion relative to each other, the frequency of the sound heard by the listener is not the same as the source frequency.
-
Option 1)
Light waves
This is incorrect.
Option 2)
Sound waves
This is incorrect.
Option 3)
Space waves
This is incorrect.
Option 4)
Both A and B
This is correct.
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