Across
- 1. a beam of light
- 3. the length of a wave
- 4. the natural agent that stimulates sight and makes things visible
- 5. colored part of eye
- 6. a mirror that bends outwards
- 8. the rate per second in sound waves
- 10. 0 degrees in a angle or a straight line
- 11. vibrations that travel through the air and can be heard when they reach a person's ear
- 13. clear protective layer of your eye
- 14. a thin layer of tissue found in your eye
- 16. the maximum extent of a vibration
- 18. what you use to hear
- 19. unit of measurement for energy
Down
- 1. the change of speed in light
- 2. the throwing back by a body or surface of light, heat, or sound without absorbing it.
- 7. something that cant be made or completely destroyed
- 9. a mirror that bends inwards
- 12. measurement of sound
- 15. the measurement of sound
- 17. the black circle in your eye