The equation

Question

Y=Acos^​​​2 (2πnt-2πx/Ã) represents a wave with 

(A) Amplitude A/2, frequency 2n and wavelength y

(B) Amplitude A/2, frequency 2n and wavelength y/2

(C) Amplitude A, frequency 2n and wavelength 2y

(D) Amplitude A ,frequency n and wavelength y

Answer 1

The correct option is b Amplitude A/2, frequency 2n and wavelength y/2

The given equation can be x written as

As y we take λ

Hence amplitude = A/ 2 and 

frequency = ω/2π = 4πn/ 2π = 2n and wave length is