see homework : solve as required!

see homework : solve as required!


Q-1 An optical medium is characterized by a quantity n ≥ 1, called the refractive index.


The refractive index n = co/c, where co is the speed of light in free space, and c is the speed of

light in the medium. Consider a light ray shown in the figure, starting at point A and reflecting off

the surface at point O before arriving at point B.


Derive the law of reflection and prove that (sin θi = sin θr ) using Fermat’s principle.


Q-2 What is the critical angle when light travels from air to glass? Explain your answer.

see homework : solve as required!

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