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The work function for a metal is 4eV. To emit a photoelectron of zero velocity from the surface of the metal, the wavelength of incident light should be :A. `2700Å`B. `1700Å`C. `5900Å`D. `3100Å` |
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Answer» Correct Answer - D The work function for a metal ………. `E_(ev) = (12400eV-Å)/(lambda Å)` |
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