A ray of light is incident on a plane surface separating two transparent substances of indices 1.60 and 1.40. The angle of incidence is 30o and the ray originates in the medium of higher index. Compute the angle of refraction. [Ans.: 34.8°]
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Explanation:
According to Snell's law,
u1 × sini = u2 × sinr
sinr = u1×sini÷u2
r = sin^-1 [ 1.6×sin30°÷1.4]
r = 34.8°
Thus, the angle of refraction is 34.8°
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