Task id9733
Ultraviolet radiation falls on a platinum plate. To stop the photoelectric effect, you need to apply a retarding voltage U1 = 3.7 V. If the platinum plate is replaced by a plate of another metal, then the retarding voltage must be increased to U2 = 6.0 V. Determine the work function of an electron from this metal. The work function of an electron from platinum is A1 = 6.3 eV (1 eV = 1.6 • 10-19 J).
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