How many elliptical orbits were added by Sommerfeld in the third orbit of the Bohr's atomic model?

One

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Two

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Three

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Seven

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Solution

The correct option is B Two
Sommerfeld modified Bohr's atomic model by adding elliptical orbits. He added one elliptical orbit to Bohr's second orbit and two elliptical orbits to Bohr's third orbit. These changes were made in such a way that the nucleus of the atom was placed at one of the principle foci of these elliptical orbits.

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