Question

An electron in the hydrogen atom jumps from excited state 'n' to the ground state. The wavelength of the
photoelectron illuminates a photo-sensitive material that has a work function - w (in eV). The stopping potential of
the photoelectron is found to be 10 eV. In a sample, electrons fall from 'n' and it is found only 2 lines belong to the
visible range. Find value of the work function w

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Answer 1

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