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NEET2017PhysicsAtomic PhysicsActual

The ratio of wavelengths of the last line of the Balmer series and the last line of the Lyman series is_____.

Options

  1. A2
  2. B1
  3. C4
  4. D0 . 5

Correct answer

C. 4

Step-by-step solution

For last Balmer series, 1 λ b = R   1 2 2 - 1 ∞ 2 λ b = 4 R For last Lyman series, 1 λ l = R   1 1 2 - 1 ∞ 2 λ l = 1 R λ b λ l = 4 R 1 R λ b λ l = 4 Hence this is the correct answer.

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