InterviewSolution
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InterviewSolution
| 1. |
Consider a beam of electrons (each electron with energy `E_(0))` incident on a metal surface kept in an evacuated chamber. ThenA. no electrons will be emitted only photons can emit electronsB. electrons can be emitted but all with an energy, `E_(o)`C. electrons can be emitted with any energy, with a maximum of `E_(o)-phi` (`phi` is the work function)D. electrons can be emitted with any energy, with a maximum of `E_(o)` |
| Answer» When a bean of electrons of energy `E_(o)` is incident on a metal surface kept in an evaacuated chamber electrons can be emitted with maximum energy `E_(o)` (due to elastic collidion) and with any energy less then `E_(o),` when part of incident energy of electron is used in liberating the electrons from the surface of metal. | |