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Manipal MET2023PhysicsAtomic Physics

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

Options

  1. Aone
  2. Btwo
  3. Cthree
  4. Dfour

Correct answer

C. three

Step-by-step solution

Final energy of electron =-13.6+12.1=-1.51 eV This energy corresponds to third level i.e., n=3 Hence, number of spectral lines emitted = n(n-1) 2 = 3(3-1) 2 =3

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