. State the Snell's laws of refraction of light

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Answer-:

The Snell’s laws of refraction of light are:

• 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 i to the sine of the angle of refraction r is constant for the pair of given media.

Sin i / sin r = constant ₁μ₂

where constant ₁μ₂ is called the refractive index of the second medium with respect to the first medium