| A | B |
|---|
| regular reflection | bouncing of light from a smooth, even surface |
| diffuse reflection | bouncing of light from an uneven (irregular) surface |
| plane mirror | mirror with a perfectly flat surface |
| concave mirror | mirror with a surface that curves inward |
| convex mirror | mirror with a surface that curves outward |
| focal point | location at which light rays from a lens or mirror meet |
| index of refraction | comparison of light speed in air and certain material |
| lens | transparent material that refracts light |
| convex lens | lens that is thicker in the center |
| concave lens | lens that is thinner in the center |
