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chapter 17 vocab
Question | Answer |
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Density | The mass per cubic meter of a substance |
Wave | Rhythmic movement that carries energy through matter or space: can be described by its crest through wavelength and wave height |
Tranverse wave | Mechanical wave that causes particles in matter to move at right angles to the direction the wave travels |
Compressional wave | Mechanical wave that causes particles in matter to move back and forth along the direction the wave travels |
Wavelength | distance between one point on a wave and the nearest pont moving with the same speed and direction |
Frequency | Number of wavelengths that pass a given point in one second measured in hertz (Hz) |
Law of Reflection | states that when a wave is reflected the angle of incidence is equal to the angle of reflection |
Refraction | change in direction of a wave when it changes speed as it travels from one material into another |
Defraction | bending of waves around an object |
Perception | a recognition, sense, or understanding of something |
Intensity | amount of energy a wave carries past a certain area each second |
Reverberation | Repeated echoes of sound waves |
Spectrum | A range of values or properties |
Electromagnetic waves | waves that can travel through matter or empty space, include radio waves, infrared waves, visable light waves, ultroviolet waves, X rays, and gamma waves |
Infrared waves | electromagnetic waves with wavelengths between about one thousandths of a meter and about 700 billionths of a meter |
Ultroviolet waves | electromagnetic waves with wavelengths between about 400 billionths and 10 billionths of a meter |
Pitch | Human perception of the frequency of sound |