試題詳解

24. Which of the following statements regarding the photoelectric effect is false?
(A) No electrons are emitted if the incident light falls below some cutoff frequency f₀ regardless of intensity. The cutoff frequency is characteristic of the material being illuminated.
(B) Electrons are emitted almost instantaneously, even at very low light intensities.
(C) As the light intensity incident on the metal is increased, the electrons should be ejected with more kinetic energy.
(D) The maximum kinetic energy of the photoelectrons increases with increasing light frequency.