During a photoelectric effect experiment, light with a
wavelength λ = 365.4 nm from a mercury lamp is used to illuminate a
1 mm2 area of a metal cathode coated with an alloy of unknown work
function. The photocurrent in the apparatus is measured as a
function of the potential placed on the anode, and is shown in the
graph below. i) Calculate the max speed of the ejected electrons.
ii) Calculate the work function (in eV) of the metal. iii)
Calculate the cutoff frequency for this metal.
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Current I, (1A) 4 N Potential AV, (V) 23 -3 -2
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