CUET Preparation Today
| Consider a beam of electrons (each electron with energy E) incident on a metal surface kept in an evacuated chamber, then which of the following is correct? |
no electrons will be emitted as only photons can emit electrons electrons can be emitted but all with energy E electrons can be emitted with any energy with a maximum of E-W (W is the work function) electrons can be emitted with any energy with a maximum of E |
| electrons can be emitted with any energy with a maximum of E |
| When a beam of electrons is incident on a metal surface, it can undergo elastic collision where the maximum energy of the emitted electron is E, or it can undergo photoelectric effect where the maximum possible energy is E-W. |
