In a photoelectric effect experiment, photons of energy 13 eV are incident on a metal of work function = 0.9 eV due to which photoelectrons are emitted from metal. Energy of the photoelectrons are suf

Question

In a photoelectric effect experiment, photons of energy 13 eV are incident on a metal of work function = 0.9 eV due to which photoelectrons are emitted from metal. Energy of the photoelectrons are sufficient to excite a H-atom from it's ground state then :-

TestHub · Accepted Answer

K E ma x ​ = 13 − 0.9 = 12.1 e V , so KE may be 12.1 eV (A) or 10.2 eV after losing 1.9 eV (B) With KE ≤ 12.1 eV, the H-atom can be excited to n = 2 or n = 3 only (n = 4 needs 12.75 eV), giving 1, 2 or 3 spectral lines (C) Maximum stopping potential = 12.1 V (D) Answers (A, B, C, D)

Physics - Modern Physics Question with Solution | TestHub

Options:(select one or more)

Doubts & Discussion