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[" 3.A light of wavelength "4000" Á is a...

[" 3.A light of wavelength "4000" Á is allowed to "],[" fall on a metal surface having work function "],[2eV." The maximum velocity of the emitted "],[" electrons is: (use "h=6.6times10^(-34)Js)],[[" 1) "1.35times10^(5)m/s," 2) "6.2times10^(5)m/s],[," 3) "2.7times10^(5)m/s," 4) "8.1times10^(5)m/s]]

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