Question

Explain the following terms : 

a) amplitude 

b) wavelength 

c) frequency

Answer 1

a) Amplitude : 

The maximum variation in density or pressure from the mean value is called amplitude. 

(or)

The maximum disturbance of particles of a medium from their mean position is called amplitude.

b) Wavelength : 

The distance between two consecutive compressions or two consecutive rarefactions is called the wavelength of a sound wave, denoted by W. Wavelength is measured in ‘meters’. 

c) Frequency : 

1.  The number of oscillations of the density of the medium at a place per unit time is called the frequency of the sound wave. 
2.  Frequency is denoted by ‘o’. 
3.  The S.I. unit of frequency is ‘Hertz’.