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The equation y=A cos^(2) (2pi nt -2 pi (...

The equation `y=A cos^(2) (2pi nt -2 pi (x)/(lambda))` represents a wave with

A

amplitude a, frequency n and wavelength `lambda`

B

amplitude a, frequency 2n and wavelength `2lambda`

C

amplitude `a/2` , frequency 2n and wavelenght `lambda`

D

amplitude `a/2` frequency 2n and wavelength `(lambda)/2`

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The correct Answer is:
D
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