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Amplitude
The extent of a vibratory movement measured from the position of equilibrium.
Wavelength
The distance between successive crests of a wave, especially in sound or electromagnetic waves, determining its frequency and energy.
Purity
The state of being free from contamination, pollution, or other unwanted elements; often used in a moral or spiritual context to denote cleanliness or innocence.
Colour
The characteristic of visual perception described in terms of hue, lightness, and saturation, which objects produce by the way they reflect or emit light.
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