Question

1. The refractive index of four substances A, B,
C and D are 1.31, 1.43, 1.33, 2.4 respectively.
The speed of light is maximum in​

Answer 1

Answer:

REfractive index is inversely propotional to the speed of light in the medium.

(i) speed will be minimum in medium D because it has high refractive index

(ii) speed will be maximum in medium A because it has low refractive index

Explanation:

Answer 2

Answer:

The refractive index of medium A is least that is 1.31, so the velocity of light will be maximum in medium A.

Explanation:

We know that the relationship between velocity and refractive index is given by:

n= c/v

Where ,

n= refractive index of medium

c= Velocity of light in vaccum

v= Velocity of light in that medium

Rearranging the above equation we get

v=c / n

Velocity and refractive index are inversly porportional.

Hence when the refractive index is smaller the velocity of light will be maximum.

So the medium A having the least refractive index will have the maximum velocity.