Increasing the intensity of light above the threshold frequency in the photoelectric effect increases

Answer and explanation

Correct answer: B. the number of photoelectrons emitted per second

Intensity changes the number of photons, not the energy of each photon.
Answer: the number of photoelectrons emitted per second.
Why not the others: the maximum kinetic energy of each electron: that depends on frequency. the threshold frequency: it is a property of the metal. the work function: it is a property of the metal.

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