| A | B |
|---|
| visible spectrum | light energy that can be seen and can be broken into the colors of light in the rainbow. |
| ray | a narrow beam of light that travels in a straight line from a light source. |
| transparent | allows light to pass through so that whatever is behind can be seen. |
| translucent | allows light to pass through but scatters it so that whatever is behind cannot be seen clearly. |
| opaque | does not allow light to pass through. |
| absorb | to take in. |
| reflect | to bounce back. |
| transmit | to pass through. |
| convex lens | a lens that is thicker in the middle than at the edge. |
| concave lens | a lens that is thinner in the middle than at the edges. |
| wavelength | the distance from a point on a wave to the same point on the next wave. |
| vibrate | to move quickly back and forth. |
