Wavelength of wave is a distance between two particles in phase differing by

Options

A. `pi`
B. `2 pi`
C. `(2pi)/3`
D. `pi/3`

Answer

B

Explanation

At a given time (t = constant) the phase change with position x. Phase change at a given time for a distance `Deltax` is
`Deltaphi = (2pi)/(lamda) xx Deltax`
As, the distance between two crests is `lamda`
For distance `lamda`, the phase change is
`Delta phi = (2pi)/(lamda) .lamda = 2pi`