MHT CET Physics question

The Doppler's effect is not applicable

(A)when the source and observer are oppositely moving
(B)when there is relative motion between source and observer
(C)when source is at rest and observer is moving
(D)when source and observer are moving in the same direction with the same speed.Correct

Answer: (D)

Solution

If both move with the same velocity in the same direction there is no relative motion and hence no Doppler shift, whereas

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Question ID VK-069976