A light beam of wavelength is incident on a metal with work function
PHYSICS · Multi-part · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter
Problem
A light beam of wavelength 400nm is incident on a metal with work function 2.2eV. A particular electron absorbs a photon and makes two collisions before coming out of the metal.
(1) Assuming that 10% of the existing energy is lost to the metal in each collision, find the final kinetic energy of this electron as it comes out of the metal.
(2) Under the same assumptions, find the maximum number of collisions the electron can suffer before it becomes unable to come out of the metal.