Question

state the laws of refraction.what is the meaning of the refractive index of crown glass is 4.59​

Answer 1

Hello user !

Question:- Laws of refraction .

Answer :-

1: Snell's law

Definition : The ratio of value of sin of Angle of Incidence to the angle of reflection is a constant quantity.

2: The incident plane, the normal plane and the refracted plane all lies on the same plane.

Refractive index of crown glass is 4.59

It means the velocity of light in air to the velocity of light in the given medium is 4.59.
Velocity of light in air ÷ Velocity of light in crown glass = 4.59
or sin i ÷ sin r = 4.59

Hope it helps ❤ ❤