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Olympiad workbookNSEPDual Nature of Matter

A hydrogen atom ( M_ I I =1.67 10⁻²³ ~kg ), initially at rest, emits a photon and goes from the excited state n=5 to the ground state. The recoil speed of the atom is nearly

Options

  1. A4.2 ~ms ⁻¹
  2. B4 10⁻⁴ ~ms ⁻¹
  3. C2 10⁻² ~ms ⁻¹
  4. D8 10^2 ~ms ⁻¹

Correct answer

A. 4.2 ~ms ⁻¹

Step-by-step solution

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