H2 Physics · JC 2 · Hard · Energy levels and line spectra
Light of wavelength 320nm is incident on a metal surface and causes photoemission. The stopping potential measured is 1.1V. What is the work function of the metal? (Take h=6.63×10−34J s, c=3.0×108m s−1, e=1.60×10−19C.)
4.5×10−19J
1.8×10−19J
6.2×10−19J
2.7×10−19J
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