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Questions  

A ray of light is incident at an angle of 60o on a 3 cm thick plate (μ=3) . The shift in the path of the ray as it emerges out from the plate is (in cm)

a
1
b
1.2
c
0.5
d
1.8

detailed solution

Correct option is A

μ=sin isin r, 3=sin 60sin r, r=30o x=t sin i-rcos r, x=t sin 60-30cos 30                                   =3 x 1232=1 cm

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