A ray of light travelling through rarer medium is incident at very small angle i on a glass slab and after refraction its velocity is reduced by 20 % . The angle of deviation is

Question

A ray of light travelling through rarer medium is incident at very small angle i on a glass slab and after refraction its velocity is reduced by 20 % . The angle of deviation is, i 8, i 5, i 2, 4 i 5

MARKS App · Accepted Answer

As at interface, velocity of light reduces by 20 % of C ∴ δ = 20 % i = 20 100 × i = i 5

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