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Waves 2
| Question | Answer |
|---|---|
| Wave | A disturbance that moves through matter or space |
| Compressional wave | Causes particles in matter to move back and forth along the same direction |
| Diffraction | Bending of waves around an object |
| Electromagnetic spectrum | Complete range of electromagnetic wave frequencies and wavelengths |
| Electromagnetic waves | Waves that can travel through matter or empty space, includes radio waves, infrared waves visible light waves, ultraviolet waves, X rays, and gamma rays |
| Frequency | The number of wavelengths that pass by a point each second |
| Infrared Waves | Electromagnetic waves with wavelengths between about one thousandth of a meter and 700 billionth of a meter. |
| Intensity | Amount of energy a wave carries past a certain area each second. |
| Law of reflection | The angle that the incoming wave makes with the normal equals the angle that the outgoing wave makes with the normal. |
| Pitch | As the amplitude (energy) decreases the sound gets softer |
| Refraction | The change in direction of wave when it changes speed as it travels from one material to another. |
| Reverberation | Repeated echoes of sound waves. |
| Transverse wave | Causes particles in matter to move back and forth at right angles |
| Ultraviolet waves | Electromagnetic waves with wavelengths between about 400 billionth and 10 billionth of a meter. |
| wavelength | The distance between one point on a wave and nearest point moving with the same speed and direction |