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Question

In a YDSE performed with wavelength λ=5890˙A, the angular fringe width is 0.40. What is the angular fringe width if the entire set - up is immersed in water ? (μ=43)

A
0.15
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B
0.30
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C
0.40
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D
0.50
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Solution

The correct option is B 0.30
(βθ)ω=(βθ)airμω
=0.4(43)
=0.30

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