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What potential would be needed to stop the electrons

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Reference no: EM131553580

Question: When yellow light from a sodium lamp shines on a certain photocell, a negative potential of 0.3 V is needed to stop all the electrons from reaching the collector. What potential would be needed to stop the electrons if light with 4000 A is used? Remark: 4000 A = 4000 Angstroms = 4000 X 10^-10 m = 400 nm. To save you the trouble of looking up the Na yellow light wavelength = 5893 A.

Reference no: EM131553580

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