Q188. The threshold wavelength of photoelectric emission of a metal is 4000A.Then the minimum energy required to eject photo electron is.Physics — Dawn of Modern Physics — Question 188 of 217A. 4.96 eVB. 3.1 eVC. 49.6 eVD. 31 eVPractice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →