The speed of light in a transparent medium is 0.6 times that of its speed in vacuum. find the refractive index of the medium.

The refractive index is 1.66

The speed of light in a transparent medium is 0.6 times that of its speed in vacuum .

Refractive index of medium = speed of light in vacuum / speed of light in medium  

So

RI = 1/0.6 = 5/3 or 1.66

Refractive index is defined as

given that

v = 0.6 c

so we will have

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr