waves - the way light is measured, vacuum - empty space, medium - different types of matter that light interacts with, transparent - all light passes through, translucent - some light passes through and scatters, opaque - no light passes through (absorbs or reflects all light), ROY G BIV - wavelengths (red, orange, yellow, green, blue, indigo, violet), reflection - light energy bounces back at an equal and opposite angle, refraction - light energy bends as it passes from one medium to another, lens - a curved, transparent object that bends the light, concave lens - a lens that is thinner in the middle, convex lens - a lens that is thicker in the middle,

LIGHT ENERGY

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