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MHT CET20239 May 2023Evening ShiftChemistryStructure of AtomActual

What is the wave number of photon emitted during transition from orbit, n =4 to n =2 in hydrogen atom [ R _ H =109677 ~cm ⁻¹ ]

Options

  1. A20564.44 ~cm ⁻¹
  2. B23032.17 ~cm ⁻¹
  3. C15354.78 ~cm ⁻¹
  4. D25225.7 ~cm ⁻¹

Correct answer

A. 20564.44 ~cm ⁻¹

Step-by-step solution

aligned v & =109677 [ 1 2^2 - 1 4^2 ] cm ⁻¹ & =109677 [ 1 4 - 1 16 ] cm ⁻¹ & =109677 [ 12 64 ] cm ⁻¹ & =20564.44 ~cm ⁻¹ aligned

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