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Essay

What Is The Photoelectric Effect?

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Issue:

Science

 

Written by:

Kelvin E

 

Date added:

January 20, 2016

 

Level:

University

 

Grade:

B

 

No of pages / words:

2 / 401

 

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4833 times

 

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Essay content:

That is, the average energy carried by an ejected (photoelectric) electron should increase with the intensity of the incident light. In fact, Lenard found that this was not so. Rather, he found the energies of the emitted electrons to be independent of the intensity of the incident radiation. Einstein (1905) successfully resolved this paradox by proposing that the incident light consisted of individual quanta, called photons, that interacted with the electrons in the metal like discrete particles, rather than as continuous waves...
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For a given frequency, or 'color,' of the incident radiation, each photon carried the energy E = hf, where h is Planck's constant and f is the frequency. Increasing the intensity of the light corresponded, in Einstein's model, to increasing the number of incident photons per unit time (flux), while the energy of each photon remained the same (as long as the frequency of the radiation was held constant)...
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