Question

What does Bohr’s first postulate allow an electron in an atom to do?

Options

• Spiral inward and eventually fall into the nucleus

• Orbit in certain stable orbits without emitting radiant energy

• Revolve only under gravitational force

• Emit radiation continuously in every stable orbit

Answer 1

Bohr’s first postulate allows certain stable orbits in which the electron does not emit radiant energy. This is contrary to the prediction of classical electromagnetic theory.