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

Options

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

Answer

A