A) electrons can be emitted with any energy with a maximum of \[{{E}_{0}}\]
B) no electrons will be emitted as only photons can, emit electrons
C) electrons can be emitted but all with an energy \[{{E}_{0}}\]
D) electrons can be emitted with any energy with a maximum of \[{{E}_{0}}-\phi ,\]where being work function
Correct Answer: A
Solution :
The emitted electrons may lie near the. surface and so can have a maximum amount of energy \[\tan \phi =-2\cot \theta \] If they arc form deep inside, then energy is less than\[\theta =90+\lambda \]
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