A ray of light is incident at an angle of incidence, i, on one face of prism of angle A (assumed to be small) and emerges normally from the opposite face. If the refractive index of the prism is μ , the angle of incidence i, is nearly equal to :
Text Solution
Verified by ExpertsThe correct answer is:
A
For normally emerge e = 0
Therefore r 2 = 0 and r 1 = A
snell’s Law for Incident ray’s
1sin i = μ sin r 1 = μ sin A
For small angle
i = μ A
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