Two identical photocells are illuminated by the same monochromatic beam ( ) of intensity
PHYSICS · Single correct · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter
Problem
Two identical photocells are illuminated by the same monochromatic beam (ν>ν0) of intensity I. In photocell X, 30 % of the light is reflected by the metal surface, but the remaining photons eject electrons with quantum efficiency 60 %. In photocell Y, no light is reflected, but the quantum efficiency is only 40 %. What is the ratio Isat(X) : Isat(Y) of their saturation currents?
(a) 3:2
(b) 21:20
(c) 7:4
(d) 20:21