Question

A wave travelling along the x-axis is described by the equation y(x, t) = 0.005 cos(αx – βt). If the wavelength and the time period of the wave are 0.08 m and 2.0s, respectively, then α and β in appropriate units are(a) α = 25.00 π , β = π (b) α = 0.08/π , β = 2.0/π(c) α = 0.04/π , β = 1.0/π (d) α = 12.50 π , β = π/2.0

Answer 1

Answer is a)

Alpha is k i.e. 2pi/lambda

Beta is omega i.e. 2pi/t