Game: sort each spectroscopy scenario by the transition scale or visibility it most naturally belongs to.

Choose the best first label for each scenario.

A microwave probe flips a small-spacing molecular motion that tracks how the whole molecule rotates.

A strong mid-IR band appears when a C=O bond stretches and changes dipole.

A dye absorbs blue light because electrons move between molecular orbitals separated by a visible-energy gap.

A symmetric vibration is present, but the chosen electric-dipole probe barely couples to it.

Spectroscopy & light–matter