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Concepts Of Physics MCQ Edition [Volume 2]PhysicsBohr's Model and Physics of the Atom

A hydrogen atom initially in the n = 6 state undergoes two successive transitions to reach the ground state. During the first transition, a photon of 1.13 eV is emitted. Determine the energy of the photon emitted in the second transition.

Options

  1. A13.6 eV
  2. B12.1 eV
  3. C12.75 eV
  4. D10.2 eV

Correct answer

B. 12.1 eV

Step-by-step solution

The energy of an electron in the n^ th orbit of a hydrogen atom is given by E_n = - 13.6 n^2 eV . For the initial state n = 6 , the energy is: E₆ = - 13.6 6^2 = -0.378 eV During the first transition, a photon of energy 1.13 eV is emitted. The energy of the intermediate state n' is: E_ n' = E₆ - 1.13 = -0.378 - 1.13 = -1.508 eV Comparing this with the standard energy levels of hydrogen, we have E₃ = - 13.6 3^2 = -1.51 eV . Thus, the intermediate state is n' = 3 . The second transition occurs from n' = 3 to the groun

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