What happens to the speed of light when it passes from water to glass?

Answer 1

the speed of light it different when it is passed through air, water or glass because all these have different optical densities. Speed of light is fastest in air, slower in water and slowest in glass.

Answer 2

The speed of light in a vacuum is constant, however water, glass and even air will slow the speed of light down.

The formula v=c/n should be used, where n is the refractive index of the medium (for a vacuum n=1). As glass has a higher refractive index (around 1.5 depending on what its made of) the light will slow down as it goes from water into glass

Answer 3

If a beam of light from air passes through a glass or a water then the speed of light decreases because of denser nature of water or glass and because of high refractive index of water or glass

Answer 4

With the information included in the question, the only thing you can say is

that the speed changes. You can't tell whether it becomes faster or slower

than it was, until you know what medium it occupied before it entered the

water or the glass.

Answer 5

Speed of light through a medium depends on the density of the medium. Speed of light is directly proportional to the density of medium. Air is less dense than glass. So, when light goes into air from glass, the speed of light increases . The angle which the ray makes to the normal increases.

Answer 6

Its slows slightly as it hits the water, at the same time it also bends.

Answer 7

It isn't: the speed of light is the speed of light. However, light does travel slower when passing through matter than it does when light passes through a vacuum.

Answer 8

It slows down from approx 225,408,000 m/s to approx 203,940,000 m/s.

Answer 9

At that boundary, the speed increases.