Q. 24. Define wave velocity, frequency and wavelength. Give SI unit of each term.
Wave velocity: Wave velocity is the distance travelled by a wave per unit time. It is the speed with which a disturbance of the particle like crest, trough, compression or rarefaction propagates through a medium.
Its SI unit is ms–1.
(iv) Frequency: The number of waves produced per second is called frequency of the wave. It is equal to the number of compressions or rarefactions crossing a point per unit time.
Symbolically, it is denoted by v (nu).
It is equal to the reciprocal of time period.
SI unit of frequency = hertz (Hz).
Wavelength: The distance between two successive crests or troughs or between two successive compressions and rarefactions is called the wavelength.
It is denoted by λ (lambda).
SI unit of wavelength is metre (m).
