Sound and Light

Science

a lens with a center thinner than its edges
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a lens with a center thicker than its edges
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the number of cycles or vibrations per second, measured in hertz (Hz)
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a material that does not let any light pass through
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how high or low a sound is, as determined by its frequency
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the bouncing of light, sound, or heat waves off a surface
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the bending of light when it passes from one substance into another
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the loudness or softness of sound
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allows some light to pass through but scatters it
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allows light to pass  through
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the rapid back-and-forth movement of matter
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