The photoelectric work function of potassium is 2 eV. What potential difference would be applied between a potassium surface and the collector in order to just prevent the collection of electrons when the surface is illuminated by 350 nm? A.  154 V  B.  15.4 V  C.  0.154 V  D.  1.54 V

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Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.