What does amplitude measure?

1 Answer
May 31, 2018

Amplitude measures the intensity of a wave. On a wave diagram, it is the distance "#a#" from the vertical middle to the crest or trough of the wave:


In terms of sound, it is how loud the sound is:


In terms of light, it is how bright the light is:


In terms of electron orbital probability densities, it is the relative probability electrons are found in those radial coordinates (black is, it can be found more often):