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26 Cards in this Set
- Front
- Back
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Wave |
a rhythmic disturbance that carries energy but not matter. |
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Crest |
The highest point above the normal level in a transverse or electromagnetic wave |
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Trough |
The lowest point below the normal level in a transverse or electromagnetic wave |
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Mechanical wave |
waves that need a medium (solid, liquid or gas) to transfer energy. |
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Transverse wave |
a type of mechanical wave in which particles of the matter move in a direction perpendicular(at right angles) to the direction the wave moves. |
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Longitudinal/compressional wave |
a type of mechanical wave in which particles of the matter move forward andbackward in the same direction as the wave moves. |
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Wavelength: the size of the wave |
in transverse and EMS waves, it is the distance measures from crest to crestor from trough to trough; in Congressional waves, it is measured from compression to compression or fromrarefaction to rarefaction. |
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Amplitude |
related to the amount of energy the wave carries; in transverse/EMS waves, it is one half the dis-tance from crest to trough; in compressional waves, it is the radius |
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Frequency |
the number of wavelengths that pass a given point in one second; measured in Hertz (Hz). |
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Hertz (Hz) |
Units of measurement for frequency of a wave. |
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Vacuum |
an area that has no matter. |
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Medium |
any matter; a solid, liquid or gas. |
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Pitch |
how high or low a sound is. |
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Echo |
the reflection of a sound wave off of a hard surface. |
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Absorption |
the process in which a wave is retained without any reflection. |
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Transmission |
the sending out of energy. |
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Electromagnetic wave |
a special type of transverse wave that does not need matter to carry energy. |
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Electromagnetic spectrum |
range of electromagnetic waves with different frequencies and wavelengths. |
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Reflection (angle/law) |
occurs when a wave strikes an object and bounces off. |
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Refraction (angle/law) |
bending of a wave as it moves from one medium into another medium. |
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Opaque |
not transmitting or reflecting any light. |
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Translucent |
allowing a limited amount of light to pass through. |
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Transparent |
allowing light to pass through an object almost undisturbed, such that one can see through the ob-ject clearly. |
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Conduction |
heat transfer that occurs in objects that are in direct contact. |
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Radiation |
heat transfer that requires no contact between the heat source and the heated object; travels athigh speeds and long distances. |
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Convection |
Heat transfer in a gas or liquid (fluids) by the circulation of currents from one region to another. |
