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## Homework Statement

In the Bohr atom, electrons move on classical circular orbits that have angular momenta lh/2pi,

where l = 1, 2, . . ..

Show that the radius of the ﬁrst Bohr orbit is a0 and that the model predicts the

correct energy spectrum.

In fact the ground state of hydrogen has zero angular momentum. Why

did Bohr get correct answers from an incorrect hypothesis?

## Homework Equations

## The Attempt at a Solution

Ok so i've done the first part. I'm just not sure on the last question - why did bohr get correct answers from an incorrect hypothesis?