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Ultraviolet light with a single wavelength and with an intensity of 550 W/m² is incident normally on the
surface of a metal that has a work function of 3.44 eV. Photoelectrons are emitted with a maximum speed of
420 km/s. Find the maximum possible rate of photoelectron emission from 1 cm² of the surface by imagining
that every photon produces one photoelectron.

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