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Minimum Deviation

A ray of ligh...

Question

A ray of light passes through an equilateral glass prism, such that the angle of incidence is equal to the angle of emergence. If the angle of emergence is 3/4 times the angle of the prism. Find the angle of deviation.

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Solution

I = 3/4A
e = 3/4A
D = 2i/A = 3/2A÷A= 3/2

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