# What exactly determines the energy of a wave? the intensity? or the frequency?

by mutineer123
Tags: amplitude, energy, frequency, intensity waves, wave
 P: 93 I am taking AS level Physics rite now, and wanted to know what exactly determines the energy of a wave. Well since I have recently learn of stationary waves(sound waves) being standing. I know that they are formed by the superimposition of the reflected waves on the incident waves. This causes the amplitude to cancel out, and become zero. So intuitively I guess the frequency decides a waves energy, because if intensity did, then in a stationary wave, the amplitudes canceling out would make the intensity nil as well(I=κA6^2), so this will make the sound stop, which it clearly does not. So is this reasoning right?
 P: 19 It depends on the context actually. In terms of mechanical waves, for example a water wave ripple in a pond, more energy is carried by the wave for high amplitudes. Photons are another type of wave, but they carry energy in their frequency. A sound wave is a mechanical wave, and so the amplitude determines the energy of the wave.

 Related Discussions General Physics 8 General Physics 5 Introductory Physics Homework 2 Introductory Physics Homework 6 General Physics 29