Hydrogen atom in the ground state absorbs energy from the incident photon. Which makes a transition to energy level characterized by n=4 the number of lines observed are:
Correct answer: C. 6
- A. 8
- B. 4
- C. 6
- D. 10
Explanation
The transition of a hydrogen atom from the ground state to an energy level characterized by n = 4 corresponds to an electron moving from the first energy level (n = 1) to the fourth energy level (n = 4).To determine the number of spectral lines observed, we can use the formula:Number of spectral lines = n(n-1)/2=4(4-1)/2=6
This question appeared on the ETEA MDCAT 2009 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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