Across
- 1. example of a parallel beam
- 4. rays in the same direction
- 6. type of glass that converges light
- 8. example of a divergent beam
- 10. rays meet at a point
Down
- 2. type of lines in which light travels
- 3. rays spread out from a point
- 5. form of energy that enables us to see
- 7. shows the direction in which light travels
- 9. a collection of rays