Question

if the speed of light is 3 x 10^8 m/s, find the absolute refractive index of medium in which light travels with a speed of 1.5 x 10^8 m/s

Answer 1

Answer:

see this picture above

We know that,

refractive index=speed of light in vacuum/speed of light in a medium let the speed of light in a medium ben therefore, 1.5=3*10^8/n

1.5n-3*10^8,

n 3*10^8*10/1.5*10-30*10^8/15

n=2*10^8 m/s

therefore speed of light in a

medium is 2*10^8m/s

Answer 2

Answer:

n= c/v

Explanation:

1.5=3×10^8 1.5v=3×10^8 v=3×10^8/1.5 so the answer is 2×10^8