Question

The refractive index of a medium is 1.5 What is the meaning of this statement​

Answer 1

Refractive index 1.5 of a medium means: Velocity of light in the medium is (1/1.5)c, where c is velocity of light in vacuum. If a light Ray is incident at the interface of medium of refractive index 1.5 and air from the medium, it will be totally reflected if the angle of incidence is greater sin^-1(1/1.5).

Answer 2

Answer: The ratio of the velocity of light in a vacuum to its velocity in a specified medium. The sine ration of the angle of incidence an angle of refraction is 1.5

$\frac{sin(i)}{sin(r)} =1.5$