According to Bohr's theory of the Hydrogen atom, only those atomic orbits with radii 'r' and atomic shell 'n' around the nucleus are allowed which have the angular moments:
Correct answer: B. nh / 2π
- A. rh / 2π
- B. nh / 2π
- C. 2πn / h
- D. 2πr / h
Explanation
nh / 2π is the answer to this, just a factual recall. This is the correct expression representing Bohr's quantisation of angular momentum, where n is the principal quantum number, and h is Planck's constant.
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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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