KVPY SA Exam 2013 Question Paper

Question : 69 of 80

Marks: +1, -0

A ray of light incident on a transparent sphere at an angle

π/4

and refracted at an angle r, emerges from the sphere after suffering one internal reflection. The total angle of deviation of the ray is

Solution:

\S_1=π/4-r

\S_2=π-2r

\S_3=π/4-r

\S=\S_1+\S_2+\S_3

={3\π}/2-4r

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