Question

Will the velocity of light be same in all media?

Answer 1

No. The velocity of light is not the same in all media.

• The speed of light depends on the optical density (refractive index) of the medium.
• Light travels fastest in vacuum, slightly slower in air, and slower in denser media such as water and glass.
• The greater the refractive index of a medium, the lower the speed of light in that medium.

Therefore, the velocity of light is different in different media.