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A monochromatic light is just able to io...

A monochromatic light is just able to ionize a hypothetical one electron atom in its ground state having energy levels -đefined by `E_(n)=-(17)/(n^(2)) eV`, where `n` is principal quantum number. In an experimental set-up, same light is incident on a metal plate and it was found out that electrons have `2 eV` as maximum kinetic 'energy. If the work function of the metal is `5 P eV`, then find the value of `P`.

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