On a windless day, sound emanate isotropically from a point sourc… - Vidyadip

MCQ

On a windless day, sound emanate isotropically from a point source. Rays of the sound waves emanated from a point source placed close to ground are shown in the figure. Consider horizontal wind towards the left blowing with constant velocity, which is uniform everywhere. In the following figures, rays of sound waves in presence of the wind are shown. Which one is the most correct representation?

A
B
✓
D

✓

Answer

Correct option: C.

c
Velocity of sound depends on velocity of medium as $(v_s)_m = v_s ± v_m$ Here wave front is shifted to left side

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