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Variation of Intensity in Space

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Question

An observer approaches towards a stationary source of sound at constant velocity and recedes away at the same speed. The graph of wavelength observed with time is:

A

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B

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C

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D

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Solution

The correct option is C
An observer approaches towards a stationary source of sound at constant velocity and recedes away at the same speed.

With the help of Doppler’s effect, we can say that there is a change in frequency observed by the observer but the wavelength with time remains same during approach and recede.

Final Answer: (b)

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Variation of Intensity in Space

Standard XII Physics

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