A ray of light is incident on a parallel slab of thickness t and refractive index n . If the angle of incidence θ is small, than the displacement in the incident and emergent ray will be:
A
B
C
D
none
Text Solution
Verified by ExpertsThe correct answer is:
A
displacement = 
Since i and r are small angles.
Displacement = t ( i – r)
= t i 
= t θ 
= 
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