Question

ionisation potential of hydrogen is 13.6 Volt if it is excited by a photon of energy 12.1ev then the no.s of line in emission spectrum will be
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Answer 1

Ionization potential of hydrogen atom is

. Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy

. The spectral lines emitted by hydrogen atoms according to Bohr's theory will be

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Answer 2

Answer:

After absorbing 12.1 eV, the electron of H-atom is excited to 3rd shell. Thus, possible transitions we 3 i.e., 3 → 2, 2→1 and 3→1.