what are the si unit of amplitude,freqency&wavelength
SI unit of amplitude is metre (m)
as amplitude is the maximum displacement suffered by the particles of the medium from their mean positions during the wave propagation.
SI unit of displacement is metre.
so, SI unit of amplitude is metre.
SI unit of frequency is Hertz (Hz).
1Hz means that an event repeats once per second. A previous name for this unit was cycles per second
SI unit of wavelength is metre (m)
wavelength is usually a length of wave (distance between two adjacent crests or troughs of a wave is known as wavelength) and units of length is usually measured in metres (m).
so, SI units of wavelength is metre(m)