If you are shining light on a Pt electrode and no electrons are emitted, what do you have todo to generate electrons?Decrease the wavelength of the light to increase the energy of the photons to emit electronsElectrons can not be emitted from Pt because like any other noble metal it does not react, even underlight exposure (unlike other metals, e.g. Na, Sr or Cu)Increase the wavelength of the light to increase the energy of the photons to emit electronsWait longer times or increase the intensity of the light source, since the energy of the absorbed light isnot high enough to emit electrons from Pt surface

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Answered: If you are shining light on a Pt…

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