If you change light from yellow to blue (in a photoelectric effect lab), which o

Question

If you change light from yellow to blue (in a photoelectric effect lab), which one is correct among the following statements?
Question 4 options:
a.The number of electrons, which are ejected, gets increased when the intensity of both colored lights are the same.
b.The number of photons remains constant when you decrease the intensity of blue light.
c. The energy of each photon becomes increased.
d. The maximum kinetic energy of the ejected electrons remains constant.
e. There will be no change in the number of electrons being ejected.

Explanation / Answer

Both a and c are correct. Energy of photons is proportional to frequency. Blue light has a greater frequency than yellow, so therefore, the energy of the photons will be greater, making c correct. Because of this, the number of electrons that are ejected will increase, because more will be able to counterract the work function and escape. Thus, a is also correct.

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