| A | B |
|---|
| opaque | reflects or absorbs all light |
| transparent | material that transmits light |
| translucent | material that scatters light |
| regular reflection | parallel light rays hit a smooth surface |
| diffuse reflection | parallel rays hit a bumpy surface |
| plane mirror | produces an image that is right side up and the same size |
| concave mirror | curves inward |
| focal point | the point at which the rays meet |
| convex mirror | mirror that curves outward |
| mirage | image of a distant object caused by refraction |
| lens | curved piece of glass that refracts light |
| concave lens | thicker in the center than on edges |
| convex lens | thicker in the center than at the edges |
| cornea | transparent surface of eye |
| iris | colored muscle that controls amount of light entering the eye |
| pupil | black part of the eye |
| lens | the part of the eye that refracts light |
| retina | place in eye where image is formed |
| rods | distinguish black, whites, and gray |
| cones | distinguish color |
