Consider a wave rpresented by `y= a cos^(2) (omega t-kx)` where symbols have their usual meanings. This wave has

Options

A. An amplitude a, frequency `omega` and wavelength `lambda`
B. An amplitude a, frequency `2omega` and wavelength `2lambda`
C. An amplitude `(1)/(2)a` frequency `2omega` and wavelength `(1)/(2)lambda`
D. An amplitude `(1)/(2)`a, frequency `2omega` and wavelength X

Answer

C

Explanation

The wave function can be expressed as
`y = (a//2) [ 1 + cos(omegat - kx)`
So here option ("C") is correct