Waves and Radiation - Key Terms Year 9
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Last updated 9:31 AM on 10/19/22
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11 Terms
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Wave
A wave is a disturbance that transfers energy through matter or space. Created when a source of energy causes a medium to vibrate.
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Transverse wave
A wave where the particles of the medium vibrate perpendicular to the direction the wave is travelling in.
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Longitudinal wave
A wave where the particles of the medium vibrate parallel to the direction.
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Wavelength
The distance from one point of a wave to another. Eg crest to crest.
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Amplitude
The distance from the resting point of the medium to the crest or the trough.
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Frequency
How many times a wavelength happens per second, or number of vibrations per second.
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Speed
The distance a wave travels in a given amount of time, or the number of meters it travels per second.
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Hertz
The unit of frequency. One hertz has a periodic interval of one second.
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Pitch
Our ear's perception of the frequency of a sound.
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Medium
A solid, liquid or gas that a wave can travel through.
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Speed formula
speed = frequency x wavelength
Note 
Flashcards (169)