A source emits monochromatic light of frequency at a rate of
PHYSICS · Multi-part · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter
Problem
A source emits monochromatic light of frequency 5.5×1014Hz at a rate of 0.1W. Of the photons given out, 0.15% fall on the cathode of a photocell which gives a current of 6μA in an external circuit.
(1) Find the energy of a photon.
(2) Find the number of photons leaving the source per second.
(3) Find the percentage of the photons falling on the cathode which produce photoelectrons.