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vocabulary 6

Across
- a clear object that lets all light through
-a type of radiant energy that travels outwardly in straight lines and can travel through empty space
-a bouncing of light off a surface such as a mirror
- when light goes through a substance and travels in a new direction
- used to disperse white light and break it up into a spectrum of color
Down
-a tool is used to change the directions that light is traveling in order to make objects appear closer and larger, or smaller and farther away
-letting some light through objects cannot be clearly seen through translusent object
-a substance that makes possible the transfer of energy from one location to another, especially through waves
- the ability to do work move something or change matter
- not letting light through