The same progressive wave is represented by two graphs `I` and `II`. Graph `I` shows how the displacement `'y'` varies with the distance `x` along the wave at a given time. Graph `I` shows how `y` varies with time `t` at a given point on the wave. The ratio of measurements `AB` to `CD`, marked on the curves, represents :

Options

A. Wave number k
B. Wave speed V
C. Frequency v
D. Angular frequency `omega`

Answer

B

Explanation

AB = `lambda`
CD = T
`(AB)/(CD) = (lambda)/(T) = vlambda = v`