2.8 Using the photoelectric effect experiment, draw and explain graphs that show the number of electrons ejected vs. frequency or wavelength of radiation that shines on the metal.

What does the graph of number of electrons ejected vs. frequency look like, and what does it show?

X-axis: Frequency of radiation (f)

Y-axis: Number of electrons ejected

Below Threshold Frequency: No electrons are ejected if the frequency is below the threshold (f₀), because the photons don’t have enough energy to overcome the metal's work function.

Above Threshold Frequency: Electrons are ejected once the frequency exceeds the threshold. The number of ejected electrons increases with light intensity (more photons hitting the metal).

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