| A | B |
|---|
| The complete range of electromagnetic wave frequencies and wavelengths | electromagnetic spectrum |
| causes particles in matter to move back and forth along the same direction in which the wave travels | compressional wave |
| the distance between one point on a wave and the nearest point moving with the same speed and direction | wavelength |
| the angle that the incoming wave makes with the normal equals the angle the outgoing wave makes with the normal | law of reflection |
| the amount of energy that a wave carries past a certain area each second | intensity |
| repeated echoes | reverberation |
| the human perception of the frequency of sound | pitch |
| a disturbance that carries energy through matter or space | wave |
| causes particles in matter to move back and forth at right angles to the direction in whcih the wave travels | transverse wave |
| waves that can travel throgh matter or empty space | electromagnetic wave |
| the change in direction of a wave when it travel from one material to another | refraction |
