graphs of the same harmonic wave are shown below. The graph (1) on the left shows the displacement of wave y, as a function of position x for a given instant of time. The graph (2) on the right shows the displacement of wave as a function to time 't' for a given position. The speed of the wave is

Options

A. `5.0 cms^(-1)`
B. `0.5 cms^(-1)`
C. `0.4 cms^(-1)`
D. `4.0 cms^(-1)`

Answer

A

Explanation

`lamda=4 cm`
`T= 0.8 sec.`
`lamda= vT`
`v= (lamda)/(T)=(4)/(0.8xx100) =(1)/(20) m//s `