To stop the photoelectric effect caused by irradiation

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To stop the photoelectric effect caused by irradiation with ultraviolet light platinum records, you need to make a retention potential difference of 3.7 V. If the platinum plate replaced another, the retarding potential difference must be increased to 6 V. Determine the electron work function on the surface of this plate. electron work function of 6.3 eV platinum.

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Task 50274. Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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