A metal surface is irradiated with monochromatic light of frequency higher than its…
PHYSICS · Multi-part · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter
Problem
A metal surface is irradiated with monochromatic light of frequency higher than its threshold frequency in a laboratory photoelectric experiment.
(a) Define stopping potential for the photoelectric effect.
(b) State, with reason, whether the numerical value of the stopping potential depends on the intensity of the incident light when the frequency is kept fixed above the threshold.
(c) Two different metallic surfaces have the same threshold frequency ν0. The two surfaces are illuminated separately with light of frequency 1.2ν0 and equal intensity. Which surface will exhibit the larger stopping potential? Justify your answer without using numerical calculation.