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20 Cards in this Set
- Front
- Back
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light of a single wavelength that travels in a single direction with its crests and troughs aligned |
Coherent light |
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unit for sound intensity; abbreviated dB |
Decibel |
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change in pitch or frequency that occurs when a source of a sound is moving relative to a listener |
Doppler effect |
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electromagnetic wave with no mass and no charge that travels at the speed of light and is usually emitted with alpha or beta particles from a decaying atomic nucleus; has a wavelength less than about ten trillionths |
Gamma rays |
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light that contains more than one wavelength, and travels in many directions with its crests and troughs unaligned |
Incoherent light |
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electromagnetic waves that have a wavelength between about 1 mm and 709 billionths of a meter |
Infrared waves |
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amount of energy that flows through a certain area in a specific amount of time |
Intensity |
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human perception of sound intensity |
Loudness |
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radio waves with wavelengths between about 1 m and 1 mm |
Microwaves |
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material that absorbs or reflects all light and does not transmit any light |
Opaque |
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how high or low a sound seems; related to the frequencies of sound waves |
Pitch |
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lights whose waves vibrate in only one direction |
Polarized light |
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energy carried by and electromagnetic wave |
Radiant energy |
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electromagnetic waves with wavelengths longer than about 1 mm, used for communications |
Radio waves |
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system that uses the reflection of sound waves to detect objects underwater |
Sonar |
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material that transmits some light but not enough to see objects clearly through it |
Translucent |
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material that transmits almost all the light striking it so that the objects can be clearly seen through it |
Transparent |
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electromagnetic waves with wavelengths between 490 billionths and 10 billionths of a meter |
Ultraviolet waves |
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electromagnets waves with wavelengths of 750 to 400 billionths of a meter that can be detected by the human eye |
Visible light |
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electromagnetic waves with wavelengths between about 10 billionths of a meter and 10 trillionths of a meter, that are often used for medical imaging |
X-rays |
