Q. A photon of energy 3.4 $eV$ is incident on a metal having work function 2 eV. The maximum KE of photoelectrons is equal to
A) 1.4 eV
B) 1.7 eV
C) 5.4 eV
D) 6.8 eV
Explanation
(a) Maximum KE $= E - \phi_{0} = 3.4 - 2 = 1.4\ eV$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.