The energy of a wave is directly proportional to the square of the D.Amplitude
the energy of a wave is given as
E = (0.5) (μ v t ) w² A²
where t = time
μ = mass per unit length of the string
v = wave propagation of velocity.
w = angular frequency
A = amplitude
E = energy of wave
From the equation , we see that
the energy of wave "E" is directly proportional to A².
hence the correct choice is D. Amplitude.
