Question

state the laws of refraction of light. explain the term 'absolute refractive index of a medium' and write an expression to relate it with the speed of light in vacuum.​

Answer 1

Answer:

Law of refraction:-

1. the incident ray, the reflected ray and the normal to the interface of two transparent media at the point of incidence all lie in the same plane .

2. the ratio of sign of angle of incidence to the sign of angle of refraction is a constant for the light of a given colour and for the given pair of media this is also known as is snell's law of refraction .

sin I/sin r= constant

Absolute refractive Index:-

when the first medium is air or vacuum then the refractive index is called absolute refractive index .

n of m=speed of light in air or vacuum /speed of light in the other medium =c/v.

Answer 2

Explanation:

see the attached image.

I hope now you can understand it better