Q. When the photons of energy $hv$ fall on a photosensitive metallic surface (work function $hv_{0}$), electrons are emitted from the metallic surface. The electrons coming out of the surface have some kinetic energy. The most energetic ones have the kinetic energy equal to
A) $hv_{0}$
B) $hv$
C) $hv - hv_{0}$
D) $hv + hv_{0}$
Explanation
(c) Maximum KE of the emitted photoelectrons $= hv - hv_{0}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.