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Photons of energy 7 eV are incident on two metals A and B with work functions 6 eV and 3 eV respectively. The minimum de-Broglie wavelengths of the emitted photoelectrons with maximum energies are λA and λB, respectively where λAλB is equal to __________.

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Detailed Solution

KA=1eVKB=4eVK⋅E=12mv2=12m2v2mp=2mK⋅EλAλB=PBPA=KBKA=41=2

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Photons of energy 7 eV are incident on two metals A and B with work functions 6 eV and 3 eV respectively. The minimum de-Broglie wavelengths of the emitted photoelectrons with maximum energies are λA and λB, respectively where λAλB is equal to __________.