Question

The absolute refractive indices of glass and water are 1.5 and 1.3 respectively.What is the refractive index of glass with respect to water? Answer:

Answer 1

ANSWER is 1.33 .....

Answer 2

Refractive index of glass= speed in air /speed in glass

Speed in air/speed in glass

Let speed in glass be x , then

1.5=speed in air / x

Now , x=speed in air /1.5

Similarly, let speed in water be y, then

Y=speed in air /1.3

On dividing xand y ,we get

x/y= speed in air /1.5

Speed in air /1.3

• =13/15