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  • Using photon picture of light, show how Einstein’s photoelectric equation can be established. Write two features of photoelectric effect which cannot be explained by wave theory.    </

Using photon picture of light, show how Einstein’s photoelectric equation can be established. Write two features of photoelectric effect which cannot be explained by wave theory.

 

 

 

 
 
 
 
 

Answers (1)

In the photoelectric effect, electrons absorb a quantum of energy (hv) and if it exceeds the threshold frequency required for an electron to escape from the metal surface, then the electron is emitted with maximum kinetic energy.

K_{max}=hv\; -\phi _{o} (Eienstines photoelectric equation)

  • Wave theory cannot explain

i) that the photoelectric effect is instantaneous

ii) that the maximum kinetic energy is independent of the intensity of incident light.

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Safeer PP

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