Question

The absolute refractive indices of two media A and B are 2.0 and 1.5 respectively if the speed of light in medium b is 2 into 10 is the power 8 metre per second calculate the speed of light in vacuum and medium

Answer 1

abs rect index= speed of light in vacuum/
speed of light in medium

1.4=speed of light in vacuum/2*10^8
therefore

speed of light in vacuum=1.4*2*10^8
=2.8*10^8

similarly of a

the speed of light in medium a=2.8*10^8/2
=1.4*10^8