AMPLITUDE

In addition to the frequency or period, the wavelength, and the propagation speed, waves have another property: amplitude. This is the strength or height of the wave, the relative distance between peaks and troughs. When all other factors are constant, the more energy a wave contains, the greater is its amplitude.
The energy in a light wave is directly proportional to the amplitude, directly proportional to the frequency, and inversely proportional to the wavelength. The same is true for gamma rays, x-rays, UV, IR, and radio waves. However, for waves on the surface of a liquid, these exact mathematical relations do not apply. Amplitude is sometimes, but not always, a precise indicator of the energy in a wave.