Explain the following terms

a) Amplitude

b) Wavelength

c) Frequency.

a. Amplitude: It is defined as the maximum displacement of particles in the medium on either side of the mean position. It is denoted by A. Its SI unit is meter. The figure below depicts the amplitude of the wave.

b. Wavelength: It is defined as the distance travelled by a wave during the time a particle of the medium completes one vibration. Or the distance between successive crests or troughs of a wave It is denoted by Greek letter ‘λ’ read as Lambda. Its SI unit is meter. The figure below illustrates the wavelength.

c. Frequency: The number of oscillations of the particle of the medium at a place per unit of time is called frequency of the sound wave. It is denoted by Greek letter ‘ν’ read as nu. Its S.I unit is Hertz (Hz).