MHT CET Physics question

If a plane wavefront advancing parallel to reflecting surface strikes the surface then the different secondary wavelets originating from the surface have:

(A)different radii at any instant
(B)same radii at any instantCorrect
(C)infinite radii at any instant
(D)no origin from the surface

Answer: (B)

Solution

All points of the wavefront strike the surface at the same time, so all secondary wavelets start together and have the

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Question ID VK-076912