Question

# Given that i is angle of incidence and r is angle of refraction for a light ray at a boundary, the correct expression for Snell's Law is:

A

sini=sin2r

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B

sini=ksinr
[where k = constant]

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C

cosi=kcosr
[k = constant]

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D

sinr=sin2i

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Solution

## The correct option is B sini=ksinr [where k = constant] Snell’s law states that the ratio of sine of angle of incidence to the sine of angle of refraction is a constant known as refractive index. sinisinr=k where k is a constant and is called refractive index of the medium.

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