A metal surface is illuminated with monochromatic light whose frequency is greater…
PHYSICS · Single correct · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter
Problem
A metal surface is illuminated with monochromatic light whose frequency is greater than the threshold frequency of the metal. If the intensity of the light is doubled while all other conditions remain the same, which statement best describes the resulting change in the maximum speed of the emitted electrons?
(a) The maximum speed increases by a factor of 2 because the kinetic energy is proportional to intensity.
(b) The maximum speed remains unchanged because the energy of each photon is unchanged.
(c) The maximum speed doubles because twice as much energy reaches the surface each second.
(d) The maximum speed is halved because the photons are now shared among more electrons.