Optics Question 863

Question: A monochromatic light is used in Young’s double slit experiment when one of the slits is covered by a transparent sheet of thickness 1.8 mm, made of material of refractive index μ1 number of fringes which shift is 18, when another sheet of thickness 3.6 mm, made of material of refractive index μ2 is used, number of fringes which shift is 9. Relation between μ1 and μ2 is given by

Options:

A) 4μ2μ1=3

B) 4μ1μ2=3

C) 3μ2μ1=4

D) 2μ1μ2=4

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Answer:

Correct Answer: A

Solution:

[a] (μ1)t=nβ

(μ11)×1.8×105(μ21)×3.6×105)=18β9β

(μ11)=4(μ21)

4μ2μ1=3



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