Find the saturation photocurrent with the emission of electrons from the photocell cathode with an area of 50 mm ^ 2, when a light beam with a photon concentration of 10 ^ 13 m ^ -3 normally falls on the cathode. Consider that for every 100 photons there is one knocked out electron. The electron charge is 1.6 * 10 ^ -19 C, the speed of light in a vacuum is 3 * 10 ^ 8 m / s.
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