A photoelectric cell is first illuminated with monochromatic light of frequency that…
PHYSICS · Multi-part · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter
Problem
A photoelectric cell is first illuminated with monochromatic light of frequency ν1 that is just above the threshold frequency ν0 of the emitter metal. The intensity of the light is adjusted so that the saturation current is Isat,1. The light source is then replaced by another monochromatic source of higher frequency ν2 (ν2>ν1) but with the same intensity. Finally, while keeping the frequency at ν1, the intensity is doubled.
(i) Draw the three labelled I–V curves (A), (B), and (C) on common axes.
(ii) Mark Isat and V0 for each curve on your sketch.
(iii) Provide a qualitative explanation for the relative magnitudes of the three saturation currents and the three stopping potentials.