MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryAtomic StructureIntro If the threshold frequency of a metal for the photoelectric effect is ν₀, which of the following will NOT happen?
0.If ν = ν₀, KE of ejected electrons is zero.
1.If ν > ν₀, KE of ejected electrons = hν − hν₀.
2.If frequency is kept at ν₀ but intensity is increased, number of electrons ejected will increase.
3.If frequency of incident radiation is further increased, number of photoelectrons ejected will increase.
Explanation
Number of photoelectrons depends on intensity, not frequency. Increasing frequency beyond ν₀ increases KE per electron, not the number ejected.
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