Which of the following is true for the number of spectral lines going from the Lyman series to the Pfund series?
Correct answer: B. Decreases
- A. Increases
- B. Decreases
- C. Unchanged
- D. May decrease or increase
Explanation
The number of spectral lines decreases from the Lyman series (n=1) to the Pfund series (n=5) as energy level spacing decreases with higher n, resulting in fewer transitions.
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About Atomic Spectra
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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