| A | B |
|---|
| opaque | matter that does not transmit any light |
| pigment | a material giving a substance its color by absorbing some colors of light and reflecting others |
| Concave mirrors | mirrors curved inward |
| convex mirrors | mirrors curing outward towards you |
| lens | cruved, transparent object that forms an image by refracting, or bending light. |
| Convex lens | Lens that is thicker in the middle than at the edges |
| Concave lens | lens that is thinner in the middle than at the edges |
| Radiation | the emission of energy in the form of an electromagnetic wave |
| Laser | a device that produces intense light of only one color and wavelength |
