Physics Course/Photo Electric Effect

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Photo Electric Effect

Photo Electric Effect is a physical effect observed when there is a Photonic Light shine on object has the capability to release Free Electron into the environment . ie the effect of Light generates Electricity

 

Analysis

Energy of Photonic Light

E = hf

Maximum Energy absorb by object

E = hfo

Energy of Free Electron

 

From above

 
 

In order to release a free electron the velocity of electron has to be greater than 0 . This only happens at

f > fo

and therefore

 

Summary

Only Photonic Lights of energy hf that has frequency greater than the fresh hold frequency of the material are capable of generate Electricity. Photonic Lights that has capability of generating Electricity includes Visible Light, UV, X, Gamma.

Reference

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