What makes different KINDS of LIGHT?
Light is a wave. It has CRESTS and TROUGHS. The distance from one crest to the next (or one trough to the next) is called the WAVELENGTH:
Another way to look at light is to count the number of crests that pass by.
This gives you the frequency of the light:
You can identify the light as having a particular wavelength OR frequency,
and these are related because the SPEED of light, `c', is a
constant. They are related in this way:
WHERE:
