# Bohr Theory: Finding a Quantum Number

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Consider the Earth-Sun system as a giant-sized hydrogen atom, the objects interacting, however, by the gravitational force. (a) What is the quantum number, according to Bohr Theory, for the Earth's orbit about the Sun? (b) If the Earth were to make a transition to the next lowest quantum state, by what amount would its distance from the Sun increase? Take the Earth's mass to be 6.0 x 10^24 kg, the mean Earth-Sun distance to be 1.5 x 10^11 m.

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#### Solution Summary

Provides steps necessary to find the quantum number of the Earth's orbit around the Sun.

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