A source emits a sound of frequency of $400 Hz$, but the listener hears it to be $390 Hz.$ Then
A
The listener is moving towards the source
B
The source is moving towards the listener
C
The listener is moving away from the source
D
The listener has a defective ear
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C
The listener is moving away from the source
c (c)Since apparent frequency is lesser than the actual frequency, hence the relative separation between source and listener should be increasing.
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