Questions
The equation represents a wave with
a
amplitude α/2 frequency 2 n and wavelength λ/2
b
amplitude α/2, frequency 2 a and wavelength λ
c
amplitude α, frequency 2 n and wavelength 2λ
d
amplitude α, frequency n and wavelength Iλ
detailed solution
Correct option is A
Given wave is y=acos2(2πnt−2πx/λ) 2cos2θ=cos2θ+1 or cos2θ=(cos2θ+1)/2 y=acos2(2πnt−2πx/λ)+12 =a2cos4πnt−4πxλ+1 We know that the equation of a wave is given by y=a′cosω′t−2πxλ′+1 a′=a2, ωt=4πnt or 2πn′t=4πnt or n′=2n Further 2πxλ′=4πxλ or λ′=λ/2Talk to our academic expert!
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