Question

Why does light changes speed when travelling in transparent medium?

Answer 1

Hi Bhavik,

due to refractive index of the medium.

refractive index=speed of light in vacuum/ speed of light in medium.

Thanks. Spreadcsmile

Answer 2

Answer:

Light changes its speed due to differences in density in both the medium .

For example :

When light enters from denser to rarer medium , light will collide with less particles and can travel faster as compared to before .

Thus the speed of light increases and hence it bends away from the normal .

The opposite occurs when light travels from rarer to denser medium.

Explanation:

Optical density of a medium with respect to speed of light in that medium .

More the optical density , less is the speed of light .