Question

what is the law of refraction please answer fast

Answer 1

Refraction is due to change in the speed of light as it enters from one transparent medium to another

Answer 2

1 the incident ray & the refracted ray are on the opposite side of the normal to the surface at the point of incidence and all the three , i.e., the incident ray and the refracted ray and the normal are in the same plane
2 for a given pair of media , the ratio of sine of the angle of incidence to the sine of the angle of refraction is constant. this constant is called the refractive index of the second medium with respect to the first medium .