On the layer of potassium fall ultraviolet photocell

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On the layer of potassium photocell fall ultraviolet rays with a wavelength of 240 nm. To stop the emission of electrons, a potential difference needs detaining least U3 = 3 V. Determine the electron work function (in electron volts).

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Task 50076. Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
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