The presence of several fine lines in a line spectrum shows the presence of:
Correct answer: C. Sub shells
- A. Shells
- B. Energy levels
- C. Sub shells
- D. All of these options are correct
Explanation
A. Shells (Incorrect): Fine lines in a line spectrum are indicative of transitions between energy levels within an atom, not the presence of shells, which represent broad electron distribution regions. B. Energy levels (Incorrect): Fine lines in a line spectrum indeed indicate the presence of energy levels within an atom. However, it does not directly show the presence of sub-shells, which are further divisions within energy levels. C. (correct) It is because of sub energy levels.Previously the energy of sub energy level was considered to be equal but it actually differs by about 10−4 ev. Hence fine spectral lines are produced.D. This option is not correct.
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About Spectrum of Hydrogen
The hydrogen spectrum consists of discrete emission lines produced when electrons fall between quantised energy levels and release photons. Questions use the Rydberg equation, photon energy and wavelength, and identify the Lyman, Balmer, Paschen, Brackett and Pfund series, which differ from continuous spectra.
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