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Question

# When a glass slab is placed on a cross made on a sheet, the cross appears raised by 1 cm. The thickness of the glass is 3 cm. Then the refractive index of glass is :32233√2

A
32
B
32
C
3
D
2
Solution
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#### Separation (x) = 1 cmThickness (t) = 3 cmRefractive index is given by the formula,x=t(1−1μ)Substituting the values,1=3(1−1μ)13=1−1μ23=1μμ=32The refractive index of the glass slab is 32.

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