Which of the following statements are true for the photoelectric effect? Give al

Question

Which of the following statements are true for the photoelectric effect? Give all the correct answers, e.g., enter ABC.

a) The maximum kinetic energy of the ejected electrons increases linearly with the frequency of the incident light.

b) The number of electrons that are ejected per second increases with the number of incoming photons per second.

c) The maximum kinetic energy of the ejected electrons increases with the intensity of the incident light.

d) Electrons will be ejected from the metal whenever the intensity of the incident light is larger than a certain minimum.

Explanation / Answer

a) Correct

b) Correct

c) incorrect

d) incorrect

In the wave theory, greater light intensity simply means more photons.Each photon ejects electrons in the same way, so more intensity means more electrons. Threshold frequency and electron K.E. should not be affected by intensity.

For each metal, there is a threshold frequency. Light frequencies below the threshold eject no electrons, no matter how intense the light.

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