Q97 / 110 · VITEEE 2022 · Physics

The minimum wavelength in Lymann series of hydrogen spectra is \(91.2 \mathrm{~nm}\), the longest wavelength in this series must be

  • A
    \(\frac{\mathrm{eh}}{\mathrm{Vc}}\)
  • Correct answer
    B
    \(\frac{\mathrm{ch}}{\mathrm{eV}}\)
  • C
    \(\frac{\mathrm{eV}}{\mathrm{ch}}\)
  • D
    \(\frac{\mathrm{cV}}{\mathrm{eh}}\)

Solution

\(\mathrm{eV}=\frac{\mathrm{hc}}{\lambda_{\min }}\) or \(\lambda_{\min }=\frac{\mathrm{hc}}{\mathrm{eV}}\)

Hence, the correct answer is option: 'B'.

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