State the two laws of refraction of light

Answer: 

Law of refraction

Laws of refraction is also known as Snell’s law and it states that when a beam of light propagates through 2 different media via an interface, then the light’s behaviour is governed by the laws of refraction.

The two laws of refraction are-

1. The incident, refracted and normal ray strikes on the interface of the two media at the point of incidence and all lie on the same plane.
2.  Snell’s law defines that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant.

sin i / sin r = n

Examples of refraction of light-

• Twinkling of stars