A) no electrons will be emitted as only photons can emit electrons.
B) electrons can be emitted but all with an energy, \[{{\operatorname{E}}_{0}}\].
C) electrons can be emitted with any energy, with a maximum of \[{{\operatorname{E}}_{0}}\] - \[\phi \](\[\phi \] is the work function).
D) electron can be omitted with energy, with a maximum of \[{{\operatorname{E}}_{0}}\].
Correct Answer: D
Solution :
Option [d] is correct. |
Explanation: If a beam of electrons of having energy \[{{\operatorname{E}}_{0}}\] is incident on a metal surface kept in an evacuated chamber. |
The electrons can be emitted with maximum energy \[{{\operatorname{E}}_{0}}\] (due to elastic collision) and with any energy less than \[{{\operatorname{E}}_{0}}\], when part of incident energy of electron is used in liberating the electrons from the surface of metal. |
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