PHYSICS · Single correct · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter
Problem
A metal has threshold frequency 5.0×1014Hz. It is illuminated with light of frequency 4.9×1014Hz at a very high intensity. What happens?
(a) Photoelectrons are emitted because the high intensity supplies the required energy.
(b) Photoelectrons are emitted only after a measurable time lag as energy accumulates.
(c) Photoelectrons are not emitted because the frequency is below the threshold frequency.
(d) Photoelectrons are emitted but with essentially zero kinetic energy.