Across
- 3. When a wave spreads out after passing through a gap.
- 5. Waves that we can see with our eyes.
- 6. How intense or strong a light appears.
- 9. The property of light that depends on wavelength.
- 11. The height of a wave from its rest position.
- 14. How fast a wave travels.
- 15. The material through which a wave travels.
- 16. When a wave changes direction as it passes into a new medium.
- 20. When two waves meet and combine.
- 21. The back-and-forth movement of particles that produces waves.
- 22. Waves that travel through air or other materials and can be heard.
Down
- 1. The distance between two consecutive crests or compressions.
- 2. How high or low a sound seems.
- 4. A wave where the vibrations are parallel to the direction of travel.
- 7. A material that lets light pass through easily.
- 8. How strong or intense a sound seems.
- 10. A material that does not let light pass through.
- 12. A wave where the vibrations are perpendicular to the direction of travel.
- 13. The time for one complete wave to pass a point.
- 17. When a wave bounces off a surface.
- 18. A disturbance that transfers energy from one place to another.
- 19. The number of waves passing a point each second.