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Light and Sound Puzzle

Across
Ray of light hitting a smooth reflective surface at right angles
Wave in which matter vibrates in the same direction as the energy waves traveling through it
The pattern of disturbance caused by the movement of energy traveling through a medium
Reception of mechanical waves that can be heard.
Down
Measure of the amount of energy in a wave
Combination of all colors in the color spectrum
Being of a light wave as it moves from one material to another
A combination of light in a that is perceived by the human eye