Q20. The kinetic energy of most energetic electrons emitted from a metallic surface is doubled when the wavelength of the incident radiation is changed from 400 nm to 310 nm. The work function of the metal is:Physics — Dawn of Modern Physics — Question 20 of 217A. 0.9 eVB. 1.7 eVC. 2.2 eVD. 3.1 eVPractice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →