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Natural Science Forum / Physics / Research / September 2007Energy vs Intensity
What is the difference between the intensity of a wave, and its energy? DTebar@gmail.com schrieb: > What is the difference between the intensity of a wave, and its energy? The energy but not the intensity io proportional to the frequency. For monochromatic waves, the two are proportional. Arnold Neumaier > DTebar@gmail.com schrieb: >> What is the difference between the intensity of a wave, and its energy? > > The energy but not the intensity io proportional to the frequency. > For monochromatic waves, the two are proportional. IMHO, this is a misunderstanding. The question concerned the energy of a _wave_, not of a single quantum (there was no reference to quanta at all). Generally, "intensity" of a wave simply means the (time-averaged) energy flow density. Both energy and intensity are unrelated to frequency. Hans Werner Strube strube(@)physik3(.)gwdg(.)de > The energy but not the intensity io proportional to the frequency. This is true for a single photon. However a wave may have many photons, thus more amplitude and energy. A good example is laser light - it is made up of many coherent photons.  Signaturemathman |
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