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Light Waves

Crest The highest point on a wave.
Trough The lowest point on a wave.
Wavelength The length between one wave and another.
Frequency The number of waves that pass a point in a given amount of time.
Amplitude The distance between a wave's mid-point and it's crest or trough.
Transverse Wave A wave in which the crests and troughs move at right angles to the direction of the wave's travel.
Light Energy that you can see.
Reflection Light reflects off objects.
Refraction The bending of light rays as they enter a new medium.
Color spectrum The visible colors from shortest to longest wavelength .
ROYGBIV Red, Orange, Yellow, Green, Blue, Indigo, Violet