Question

define frequency and write its units? Define wavelength

Answer 1

Frequency is the number of vibrations made by a particle of medium in one second .unit-Hz(hertz).

Wavelength can be defined as the distance between two successive crests or troughs of a wave. unit-metre(m)

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Answer 2

The number of vibrations produced by a vibrating body in one second is called frequency. Its S.I unit is Hertz (Hz).
Wavelength can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave.