Question

state the law of refraction​

Answer 1

the principle that for a ray, radar pulse, or the like, that is incident on the interface of two media, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocity of the ray in the first medium to the velocity in the second medium and the incident ray, refracted ray, and normal to the surface at the point of incidence all lie in the same plane.

Answer 2

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.