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2. A light of frequency 6.7 1014 Hz is incident on the surface of a metal which has work function 1.5 eV. Calculate the maximum

2. A light of frequency 6.7 1014 Hz is incident on the surface of a metal which has work function 1.5 eV. Calculate the maximum velocity of the photoelectron emitted from this surface and the voltage needed to stop the electron

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