In hydrogen spectrum which one of the following series lies in the ultraviolet region ?
Correct answer: D. Lymann series
- A. Balmer series
- B. Pfund series
- C. Bracket series
- D. Lymann series
Explanation
The Lyman series consists of transitions ending at n = 1. These transitions have relatively large energy differences and therefore high frequencies and short wavelengths in the ultraviolet region. The likely mistake is choosing the Balmer series, which is the familiar visible series, not the ultraviolet one.
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Atoms emit or absorb light at specific wavelengths because electrons occupy quantized energy levels and change levels by absorbing or releasing photons. The topic covers emission and absorption spectra, spectral series, hydrogen’s line spectrum, energy-level transitions, and the relation between wavelength, frequency and photon energy.
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