Includes radio waves, x-rays, and microwaves.

Is the principle used by fiber optics.

Two of these at right angles can cancel out light.

If this number is bigger, the light refracts more.

A single packet or particle of light.

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

When white light separates into its different colors.

A light source that has only one wavelength of light.

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

A tube that can guide light, even around corners.

Beyond this light reflects instead of reflects.

Will not spread out when passed thru a prism.

All light, both visible and invisible.

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

When light becomes trapped inside a substance.

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

Light amplification by stimulated emission of radiation.

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

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

Works by total internal reflection.