A wave travelling along the x-axis is described by the equation `v(x, t) = 0.005 cos(alpha x - betat)`. If the wavelength and the time period of the wave are `0.08m` and `2.0s`, respectively, then `alpha and beta` in appropriate units are

Options

A. `alpha =( 0.08)/( pi ) ,beta =( 2.0)/( pi ) `
B. ` alpha = ( 0.04)/( pi) ,beta =(1.0)/(pi)`
C. `alpha =12.50 pi , beta =(pi)/( 2.0)`
D. `alpha =25.00pi, beta =pi`

Answer

B