reflection - bouncing of light waves off a surface, refraction - bending of light as it passes through one medium to another, absorption - light soaking into objects, transmitted - when light passes through a medium, opaque - materials that allow no light to pass through, transparent - a material that is clear that allows all light to pass through, straight line - how light travels through space, prism - an object that refracts light and separates white light into the colors of the rainbow, translucent - a material that allows some light to pass through, medium - type of material, lens - a piece of glass or other transparent substance with curved sides for concentrating or dispersing light,

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