The ionisation potential of hydrogen atom is 13 . 6 eV . Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12 . 1 eV . The spectral lines emitted by hydrogen a

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The ionisation potential of hydrogen atom is 13 . 6 eV . Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12 . 1 eV . The spectral lines emitted by hydrogen atoms according to Bohr's theory will be

TestHub · Accepted Answer

Energy in excited state = - 13.6 + 12.1 = - 1.5 e V ∴ - 13.6 n 2 = - 1.5 ∴ n = 13.6 1.5 = 3 Number of spectral lines = n ( n - 1 ) 2 = 3 ( 3 - 1 ) 2 = 3

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