A ray of light is incident on a thick slab of glass of thickness t as shown in the figure. The emergent ray is parallel to the incident ray but displaced sideways by a distance d. If the angles are small then d is, :
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
:
From figure, in right angled 
or d = BC sin (i – r) …(i)
Also, in right angled 
…(ii)
Substitute equation (ii) in equation (i), we get
For small angles sin 
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