Optics Question 943

Question: In the given curve of the above question, find the value of angle $ i _{1} $ in degrees.

Options:

A) $ 40^{o} $

B) $ 60^{o} $

C) $ 70^{o} $

D) $ 90^{o} $

Show Answer

Answer:

Correct Answer: D

Solution:

[d] When angle of incidence is $ i _{1},e=40^{o} $ (from reversibility of ray) also $ \delta =70^{o} $

$ \Rightarrow $ $ 70^{o}=i _{1}+40^{o}-A\Rightarrow i _{1}=90^{o} $



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