Question

Consider a beam of electrons (each electron with energy E₀) 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, E₀(c) electrons can be emitted with any energy, with a maximum of E₀ – Φ (Φ is the work function)(d) electrons can be emitted with any energy, with a maximum of E₀

Answer 1

Answer:

C) Can be emitted with any energy, with a maximum of E0.

Explanation:

If a beam of electrons of having energy E0 is incident on a metal surface kept in an evacuated chamber, then the electrons will be emitted with the maximum energy E0 due to the elastic collision. Thus, with any energy less than E0, a part of incident energy of electron can be used in liberating the electrons from the surface of the metal.

Therefore, if an incident on a metal surface kept in an evacuated chamber then the electrons can be emitted with any energy, with a maximum of E0.