Waves Revision

4. A wave changing direction when it bounces off a different material.
5. Maximum vibration, measured from the middle of the wave.
7. An imaginary line at 90 degrees to the object. It is used to measure all the angles.
9. A material that allows no light to pass through.
10. Visible light is part of this spectrum.
13. Organ of the body that detects noise.
14. The unit of wavelength
17. A wave changes direction when going through a different material.
18. A material that allows all light through it.

1. How quiet or loud something is.
2. A material that allows some light through it.
3. A piece of material that only allows light of a particular colour to pass through.
6. The distance between two identical points on a wave.
8. Light can travel through it but sound can't.
11. The number of waves produced in one second.
12. Sound is a wave of _________.
13. Organ of the body that detects light.
15. The unit of frequency
16. The musical equivalent to frequency.