# Question: a What is the de Broglie wavelength of the Earth

(a) What is the de Broglie wavelength of the Earth in its orbit about the Sun?

(b) Treating the Earth as a de Broglie wave in a large “gravitational” atom, what would be the principal quantum number, n, of its orbit?

(c) If the principal quantum number increased by 1, how would the radius of the orbit change? (Assume a circular orbit.)

(b) Treating the Earth as a de Broglie wave in a large “gravitational” atom, what would be the principal quantum number, n, of its orbit?

(c) If the principal quantum number increased by 1, how would the radius of the orbit change? (Assume a circular orbit.)

## Answer to relevant Questions

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