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Molecules and Crystals

Problem 6.167

Determine the angular rotation velocity of an S2S_{2} molecule promoted to the first excited rotational level if the distance between its nuclei is d=189d=189 pm.

Reveal Answer
ω=42ℏ/md3=1.57⋅1011 s−1,where m is the mass of the molecule\omega=4 \sqrt{2} \hbar / m d^{3}=1.57 \cdot 10^{11} \mathrm{~s}^{-1}, \text {where } m \text { is the mass of the molecule}
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