reflection - can be diffuse or specular, refraction - when light appears to bend, optics - the study of how light is seen, straight lines - the direction light travels, luminous - produces light, non-luminous - an object that does not produce light (but may reflect it), transparent - allows all light to pass through, translucent - allows some light to pass through, opaque - allows no light to pass through, shadow - caused when light hits an opaque object, umbra - the darkest part of a shadow, penumbra - a lighter or partial shadow, ray - a straight line of light, luminance intensity - a measurement of brightness, the moon - an example of a non-luminous object, the sun - an example of a luminous object, specular - a type of reflection that produces a clear image, diffuse - a type of reflection that produces a blurry image, foot candles - a unit of light measurement from olden times, heat - produced by infrared light,

Optics 1.0 Vocabulary Matching Game

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