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 II 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=lamda`
`CD=T`
`(AB)/(CD)=(lamda)/(T)=flamda=v` i.e., wave speed