The speed of light in air depends on:

The speed of light in vacuum is approximately:

If the speed of light in air is 3 x 10⁸ m/s, then the speed of light in a medium of refractive index 2 is

Light travels at a maximum speed in:

If the speed of light in carbon disulfide and vacuum is X and Y respectively, then

The refractive index of crown glass is close to 3/2. If the speed of light in air is c, then the speed of light in the crown glass will be close to