When light becomes trapped inside a substance.

A number that tells you how slow light moves in a substance.

Works by total internal reflection.

Light amplification by stimulated emission of radiation.

If the incoming ray is within this amount, the light will refract thru the surface.

When white light separates into its different colors.

If this number is bigger, the light refracts more.

Will not spread out when passed thru a prism.

A tube that can guide light, even around corners.

Angle at which light refracts at 90º to the surface.

Is the principle used by fiber optics.

After passing thru one of these all of the light is in one direction.

Two of these at right angles can cancel out light.

What happens to white light when it passes thru a prism.

Given off when the excited electrons in the atom fall to a lower orbit.

A light source that has only one wavelength of light.

Includes radio waves, x-rays, and microwaves.

Beyond this light reflects instead of reflects.

A single packet or particle of light.

All light, both visible and invisible.