Meaning of rarefaction , compression, wavelenght (with formula)
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refraction-
phenomenon of bending of light at interphase when it travels from one medium to another
compression-
decrease in volume of any object or substance resulting from applied stress. Compression may be undergone by solids, liquids, and gases and by living systems.
wavelength-
The distance between two consecutive compressions or two consecutive rarefactions is known as the wavelength. Its SI unit is metre (m). (b) Frequency: The number of complete oscillations per second is known as the frequency of a sound wave.
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