Across
- 3. Waves energy dies off in soft material
- 5. Shift: Siren drives by, its pitch changes
- 7. Waves travel perpendicular
- 12. Top of a wave
- 13. Light can pass through clearly
- 14. Spectrum: An ordered list of all types of electromagnetic radiation
- 17. Part of a wave bends around a corner
- 19. Coils are squeezed together
- 20. Wave bends when entering a transparent boundary
Down
- 1. Bottom of a wave
- 2. Distance of two identical points
- 4. Light can pass through, yet not entirely clear
- 6. Wave bounces off when it hits a hard boundary
- 8. Waves travel parallel
- 9. Matter in which waves travel in
- 10. When two waves overlapped and interact
- 11. Coils are stretched apart
- 15. The number of waves that pass a given point
- 16. Distance from rest to crest
- 18. Light can not pass in