Physics

Problem

The key feature of Bohr's theory of spectrum of hydrogen atom is the quantization of angular momentum when an electron is revolving around a proton. We will extend this to a general rotational motion to find quantized rotational energy of a diatomic molecule assuming it to be rigid. The rule to be applied is Bohr's quantization condition. A diatomic molecule has moment of inertia

I

. By Bohr's quantization condition its rotational energy in the

n

th level (

n = 0

is not allowed) is a.

\frac{1}{n^2} \left( \frac{\hbar^2}{8\pi^2 I} \right)

\frac{1}{n} \left( \frac{\hbar^2}{8\pi^2 I} \right)

n \left( \frac{\hbar^2}{8\pi^2 I} \right)

n^2 \left( \frac{\hbar^2}{8\pi^2 I} \right)

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