Q140. 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 — NUST Mock 10 — Question 140 of 200A. 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 →