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waves
| Question | Answer |
|---|---|
| Compressional wave | Mechanical wave that causes particles in matter to move back and forth. |
| Diffraction | bending of waves around an object. |
| Electromagnetic Spectrum | complete range of electromagnetic wave frequencies and wavelengths |
| Electromagnetic Wave | waves that can travel through matter or empty space |
| Frequency | number of wavelengths that pass a given point in one second |
| infrared waves | electromagnetic waves with wavelengths between about one thousandth of a meter and 700 billionths of a meter. |
| intensity | amount of energy a wave carries past a certain area each second. |
| Law of reflection | states that the angle the incoming wave makes with the normal to the reflecting surface equals the angle the reflected wave makes with the surface. |
| pitch | human perception of the frequency of sound. |
| refraction | change in direction of a wave when it changes speed as it travels from one material into another. |
| reverberation | repeated echos of sound waves. |
| transverse waves | mechanical wave that causes particles in matter to move at right angles to the direction the wave travels. |
| ultra violet waves | electromagnetic waves with wave lengths between about 400 billionths and 10 billionths of a meter. |
| wave | disturbance that moves through matter and space and carries energy away. |
| wavelength | distance between one point on a wave and the nearest point moving with the same speed and direction. |