Rotational Transitions

Some articles on rotational transitions, transition, transitions:

Rigid Rotor - The Linear Rotor - Selection Rules
... Rotational transitions of a molecule occur when the molecule absorbs a photon ... the wavelength of the em field) this transition may be seen as a sideband of a vibrational and/or electronic transition ... Pure rotational transitions, in which the vibronic (= vibrational plus electronic) wave function does not change, occur in the microwave region of the electromagnetic spectrum ...
Electromagnetic Absorption By Water - Overview
... water molecule, in the gaseous state, has three types of transition that can give rise to absorption of electromagnetic radiation Rotational transitions ... Vibrational transitions in which a molecule gains a quantum of vibrational energy ... The fundamental transitions give rise to absorption in the mid-infrared in the regions around 1650 cm−1 (μ band, 6 μm) and 3500 cm−1 (X-band, 2.9 μm ...