State the Snell’s laws of refraction of light.

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Solution

The Snell’s law of refraction states that:

The incident ray, the refracted ray and the normal at the point of incidence, all lie in the same plane.

The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant for the pair of the given media.

$fraction numerator S i n space i over denominator S i n space r end fraction equals mu presubscript 1 subscript 2 W h e r e space mu presubscript 1 subscript 2 space i s space k n o w n space a s space t h e space r e f r a c t i v e space i n d e x space o f space t h e space s e c o n d space m e d i u m space w i t h space r e s p e c t space t o space t h e space f i r s t space m e d i u m$

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