How is the speed of light affected when it passes through air, water, or glass ?

It decreases

Explanation:

The speed of light in a vacuum is

When it travels into a medium, however, light slows down. the speed of light in a medium is given by the equation

where

v is the speed of light in the medium

c is the speed of light in a vacuum

n is the refractive index of the medium

We see that the larger the refractive index of the medium, the lower the speed of light in that medium. For air, water and glass we have:

Air:

Water:

Glass:

So we can calculate the speed of light in the three mediums:

Air:

Water:

Glass:

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.