Question

What
is refraction
and write its law.​

Answer 1

Answer:

change in direction of propagation of any wave as a result of its travelling at different speeds at different points along the wave front.

Laws of refraction state that: The incident ray, reflected ray and the normal, to the interface of any two given mediums; all lie in the same plane. The ratio of the sine of the angle of incidence and sine of the angle of refraction is constant.

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Answer 2

Refraction:

The phenomenon of bending of light ray at the boundary of two mediums when it goes from one medium to other is known as Refraction of light.

Laws of Refraction:

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

2. The ratio of sine of angle of incidence and sine of angle of refraction is constant which is known as the refractive index of first medium with respect to second medium. It is represented by u.

1u2 = sin i/ sin r

This law is called snell's law

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