The energy of a wave is directly proportional to the square of the ___. D. Amplitude c. crest b. wavelength a. frequency

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.