http://www.mysticbanana.com/quantum-model-of-light.html New Age Spirituality Magazine Thu, 19 Jan 2012 13:25:36 +0000 hourly 1 http://www.mysticbanana.com/quantum-model-of-light.html/comment-page-1#comment-80368 scientist768 Thu, 29 Jul 2010 18:19:30 +0000 http://mysticbanana.com/quantum-model-of-light.html#comment-80368 The quantum theory says that electromagnetic radiation(light) consist of localised bundle of quantized energy units called photon(similar to the concept of light particle).The expression for the amount of energy contained in a photon is directly proportional to its frequency, f, which is given by: E=hf h= planck's constant Hence the emission of photoelectrons from a photo emissive surface(which is measured as the current passing through the anode in a photoelectric cell) is dependent on the energy supplied to the electron in the form of electromagnetic radiation.This shows that by supplying electromagnetic radiation with high frequencies, an adequate amount of energy can be transfered to the electron to be emitted.In this case, UV light has higher frequency(hence higher energy) than the red light. However, experimental results prove that the intensity of radiation(the amplitude of the wave) seem to have no effect on the photoemission of electron. The quantum theory says that electromagnetic radiation(light) consist of localised bundle of quantized energy units called photon(similar to the concept of light particle).The expression for the amount of energy contained in a photon is directly proportional to its frequency, f, which is given by:
E=hf
h= planck’s constant
Hence the emission of photoelectrons from a photo emissive surface(which is measured as the current passing through the anode in a photoelectric cell) is dependent on the energy supplied to the electron in the form of electromagnetic radiation.This shows that by supplying electromagnetic radiation with high frequencies, an adequate amount of energy can be transfered to the electron to be emitted.In this case, UV light has higher frequency(hence higher energy) than the red light.
However, experimental results prove that the intensity of radiation(the amplitude of the wave) seem to have no effect on the photoemission of electron.

]]> http://www.mysticbanana.com/quantum-model-of-light.html/comment-page-1#comment-80367 The Instigator Thu, 29 Jul 2010 18:03:04 +0000 http://mysticbanana.com/quantum-model-of-light.html#comment-80367 The individual photons need to be of sufficient energy to kick out an electron. Otherwise the photons are just absorbed and re-emitted. It's like shooting a thousand bullets at a tank instead of one big-ass rocket. The individual photons need to be of sufficient energy to kick out an electron. Otherwise the photons are just absorbed and re-emitted. It’s like shooting a thousand bullets at a tank instead of one big-ass rocket.

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