Chemistry

Problem

A molecular sample is illuminated with light of wavelength

550\,\text{nm}

. Which type of transition is the light most likely to promote in the molecules? a)

\text{A vibrational transition in a covalent bond}

\text{A rotational transition about a principal axis}

\text{An electronic transition between valence molecular orbitals}

\text{A nuclear spin flip that gives rise to an NMR signal}