| A | B |
|---|
| visible spectrum | light that humans can see with their eyes |
| ray | one of the lines of light that appear to be given off by a bright object |
| transparent | materials that let light pass through |
| translucent | materials that block some light and let some pass through |
| opaque | materials that block all light |
| absorb | to transform (radiant energy or light) into a different form usually with a resulting rise in temperature |
| reflect | to bend or throw back waves of light, sound, or heat |
| transmit | to pass or cause to pass through space or a material |
| convex lens | a lens that is curved or rounded like the outside of a sphere or circle |
| concave lens | a lens that is hollowed or rounded inward like the inside of a bowl |
