Question

definition of refraction of light and two laws of refraction....
in short....
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Answer 1

Answer:

The two laws followed by a beam of light traversing through two media are: The incident ray refracted ray, and the normal to the interface of two media at the point of incidence all lie on the same plane. The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant.

Explanation:

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Answer 2

Explanation:

Refraction : The phenomenon of change in the direction of light when it passes from one transparent medium to another is called refraction.

Laws of refraction :

(i) The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane.

(ii) The ratio of sine of angle of incidence to the sine of angle of refraction is a constant, for the light of a given colour and for the given pair of media. This law is also known as Snell’s law of refraction.

If i is the angle of incidence and r is the angle of refraction, then, 1u2=sin i / sin r

This constant value is called the refractive index of the second medium

with respect to the first.