Across
- 1. A straight line showing the path of light
- 3. Specific wavelength of light reflected
- 4. When waves pass through materials
- 8. Needs medium to travel through
- 9. Energy that allows us to see
- 10. Anything with mass and volume
- 11. A disturbance that moves energy
- 12. Distance between wave peaks
- 13. Reflects color
- 16. A reflected sound wave
- 17. When light bends as it changes mediums
- 19. Material that is clear enough for light to pass through
- 20. The colors humans can see
Down
- 2. Wave height
- 5. A vibration heard by the ear
- 6. The intensity of light
- 7. Can travel through empty space
- 8. The material a wave travels through
- 14. Bouncing off a surface
- 15. When a material absorbs the waves energy
- 18. How many waves pass per second