Which of the Following Is True of the Photoelectric Effect

Multiple Choice

Which of the following is true of the photoelectric effect?

A) The number of electrons emitted by a metallic surface is independent of the frequency of incident light.
B) The number of electrons emitted by a metallic surface is independent of the intensity of light at any frequency.
C) The number of electrons emitted by a metallic surface is directly proportional to the intensity of incident light above the threshold frequency.
D) The number of electrons emitted by a metallic surface is proportional to the frequency of incident light only below a certain light intensity.
E) The number of electrons emitted by a metallic surface is inversely proportional to the intensity and frequency of incident light.