The Rotation Spectrum of the HCl Molecule Suggests a Photon

Multiple Choice

The rotation spectrum of the HCl molecule suggests a photon in the far infrared (around 5.0 × 10−⁶ m) can excite the first rotational level. From this data, the moment of inertia of the HCl molecule (in kg ⋅ m²) is

A) 2.8 × 10−⁴⁸
B) 2.8 × 10−⁴⁹
C) 2.8 × 10−⁴⁷
D) 2.8 × 10−⁴⁶
E) 2.8 × 10−⁴⁵