When an electron drop from any higher orbit i.e. n2 > 3 to the second orbit n1 = 2, the spectral lines produced fall in the region:
Correct answer: A. Visible
- A. Visible
- B. Ultraviolet
- C. Infrared
- D. None of the above
Explanation
Transitions ending on the second orbit form the Balmer series, and the Balmer lines fall in the visible region. That is why hydrogen shows its familiar red, blue-green and violet lines.
This question appeared on the ETEA MDCAT 2015 paper, which you can sit online with every answer explained.
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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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