The work function for a metal is 4eV. To emit a photo electron of zero – InterviewSolution

1.	The work function for a metal is 4eV. To emit a photo electron of zero velocity from the surface of the metal, the wavelength of incident light should be:
Answer» 2700`OVERSET@A` 1700 `overset@A` 5900 `overset@A` 3100`overset@A` ANSWER :D

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