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COMEDK2023PhysicsAtomic Physics

The first emission of hydrogen atomic spectrum in Lyman series appears at a wavelength of

Options

  1. A3 R 4 ~cm ⁻¹
  2. B4 3 R ~cm
  3. C7 R 144 ~cm ⁻¹
  4. D400 9 R ~cm

Correct answer

B. 4 3 R ~cm

Step-by-step solution

aligned & We know that, 1 =R ( 1 n₁^2 - 1 n₂^2 ) & 1 =R ( 1 1₁^2 - 1 2^2 )= 3 R 4 = 4 3 R ~cm aligned

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