MHT CET 2024 Physics question

How is the interference pattern affected when violet light replaces sodium light ?

(A)The fringes becomes brighter.
(B)The fringes become faint.
(C)Fringewidth decreases.Correct
(D)Fringewidth increases.

Answer: (C)

Solution

In Young's experiment the fringe width is , so for fixed and . Violet light (about 400 nm) has a shorter wavelength than sodium light (589 nm), so the fringe

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Question ID VK-096638