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[" Light of wavelength "0.6 mu m" from a...

[" Light of wavelength "0.6 mu m" from a sodium lamp falls on a photocell and causes the "],[" emission of photoelectrons for which the stopping potential is "0.5V" .With light of "],[" wavelength "0.04 mu m" from a mercury vapor lamp,the stopping potential is "1.5V" ."],[" Then,the work function [in electron volts] of the photocell surface is "]

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Light of wavelength 0.6mum from a sodium lamp falls on a photocell and causes the emission of photoelectrons for which the stopping potential is 0.5V. With light of wavelength 0.4mum from a murcury vapor lamp, the stopping potential is 1.5V . Then, the work function [in electron volts] of the photocell surface is

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