Chapter 14 Vocabulary

1. The perception of how high or low a sound is; related to the frequency of a sound wave
3. An electromagnetic wave that has a wavelength shorter than a microwave but longer than visible light
5. The number of wavelengths that pass by a point each second
7. Region of a longitudinal wave where the particles of the medium are closest together
9. wave An electromagnetic wave that has a slightly shorter wavelength and higher frequency than visible light
11. The change in direction of a wave as it changes speed in moving from one medium to another
12. A wave in which the disturbance is parallel to the direction the wave travels
13. A material that allows almost all of the light striking it to pass through, and through which objects can be seen clearly
17. A wave that can travel only through matter
18. A material that allows most of the light that strikes it to pass through, but through which objects appear blurry

2. A wave in which the disturbance is perpendicular to the direction the wave travels
4. The maximum distance a wave varies from its rest position
6. Region of a longitudinal wave where the particles of the medium are farthest apart
8. A low-frequency, low-energy electromagnetic wave that has a wavelength longer than about 30 cm
10. The amount of energy that passes through a square meter of space in one second
14. The unit used to measure sound intensity or loudness
15. A material through which light does not pass
16. A transverse wave that can travel through empty space and through matter