Consider a beam of electrons (each electron with energy 
) incident on a metal surface kept in an evacuated chamber. Then:
A
No electrons will be emitted as only photons can emit electrons
B
Electrons can be emitted but all with an energy, 
C
Electrons can be emitted with any energy, with a maximum of 
( 
is the work function)
( is the work function)
D
Electrons can be emitted with any energy, with a maximum of 
Text Solution
Verified by ExpertsThe correct answer is:
D
When a beam of electrons of energy 
is incident on a metal surface kept in an evacuated chamber, electrons can be emitted with maximum energy 
(due to elastic collision) and with any energy less than 
, when part of incident energy of electron is used in liberating the electrons from the surface of metal.
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