Ionisation potential of hydrogen atom is 13.6 V . Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12.1 eV . The spectral lines emitted by hydrogen atoms acco

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Ionisation potential of hydrogen atom is 13.6 V . 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 the excited state = − 13.6 + 12.1 = − 1.5 eV ∴ − n 2 13.6 ​ = − 1.5 or n = 1.5 13.6 ​ ​ = 3 ∴ Number of spectral lines = 2 n ( n − 1 ) ​ = 2 3 ( 3 − 1 ) ​ = 3

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