Question

what is amplitude? what is the SI unit of amplitude​

Answer 1

The amplitude of a periodic variable is a measure of its change in a single period. There are various definitions of amplitude, which are all functions of the magnitude of the differences between the variable's extreme values. In older texts, the phase of a period function is sometimes called the amplitude.

The SI unit of amplitude is the meter [m], but other length units may be used.

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Answer 2

Answer:

The amplitude of a wave can be defined as the maximum displacement of the particle of a medium on either side of its mean position when a wave passes through a medium. The S.I. unit of amplitude is meter (m).