Across
- 2. repeated over a particular period of time
- 7. an educated guess
- 9. perceived by the human eye
- 11. Colors
- 12. astronomy use to measure spectrum
- 13. spectrum for atoms
- 14. dark lines
Down
- 1. distance between corresponding points
- 3. cannot be broken down
- 4. An acronym
- 5. localized to a single point
- 6. using your 5 senses
- 8. useful for analyzing and reflecting light
- 10. the redirection of a wave