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Consider a beam of electrons (each elect...

Consider a beam of electrons (each electron with energy E_0) 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, `E_0`

C

electrons can be emitted with any energy, with a maximum of `E_0-phi` (phi is the work function)

D

electrons can be emitted with any energy, with a maximum of `E_0`.

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