Question

(a) State the laws of refraction.
b)On entering a medium from air, speed of light reduces by one third of its
Value. What is the refractive index of the medium?laws of refraction ​

Answer 1

Answer:

a) two laws of refraction are as follows;

1. the ray of incident, ray of refraction and the normal drawn to the interface always lie on the same plane.

2.the ratio of sine angle of incident to the sine angle of refraction is a constant.

b)refractive index = speed of light in air/speed of light in medium

    speed of light in air is 3*10^8 and

speed of light in medium will be 1/3 * ( speed of light in air)=1/3*3*10^8

R(m)= 3*10^8/3*10^8*1/3

 R(m)=3

so the refractive index of medium, m is 3.

ask for any doubt in the answer

if you find any fault in the answer then you could delete it.

hope you will find it helpful.............................