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The displacement d produced in a glass block of thickness...

The displacement d produced in a glass block of thickness t and refractive index n when an object is viewed through it is

A.

t – n

B.

t (1 + 1/n)

C.

t (1-1/n)

D.

t (1/n - 1)

Correct answer is C

n = real depthapparent depth

n = ttd

td1 = tn

-d = tn - t

d = - tn + t

d = t - tn

d =t (1 - 1n)