Sommerfelds modification in Bohrs model is_______________?
Correct answer: B. Orbit is elliptical
- A. Orbit is cylindrical
- B. Orbit is elliptical
- C. Orbit is longitudinal
- D. Orbit is asymmetrical
Explanation
Sommerfeld extended Bohr’s circular-orbit model by allowing electrons to move in elliptical as well as circular orbits, helping explain the fine structure of spectral lines. The other orbit descriptions do not represent his modification. Students may choose “asymmetrical” because an ellipse is not circular, but the specific scientific term is elliptical.
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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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