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[" The work function of metal "A" and "B...

[" The work function of metal "A" and "B" are in the "],[" ratio "1:2" .If light of frequencies "f" and "2f" are "],[" incident on the surfaces of "A" and "B" respectively,"],[" the ratio of the maximum kinetic energy of "],[" photo electrons emitted will be "(f" and "2f" both "],[" frequency greater than threshold frequency of "],[" metal "A" and "B)]

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