Across
- 4. specially made to direct light
- 5. the study of the behavior of light
- 8. a study of all the parts of something
- 10. to send out
- 11. to make go in all directions
- 12. the colors formed when light is split by a prism
- 13. most important; basic
- 15. to split or break up
- 17. to send out rays; to shine
- 18. glowing with heat
- 19. allowing most of the light to pass through
Down
- 1. a particle of light energy
- 2. specially coated to produce glowing light
- 3. letting some light through
- 6. a thin oil used for lamps and for fuel
- 7. the production of light by living organisms; glowing life
- 9. the act of colliding with something else
- 10. a famous American inventor
- 11. to bend around an object
- 14. to bend at a certain angle
- 16. to produce or cause to be