Molecules Meet Light

Each region probes something different

An interactive lesson with 4 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• E = hc/λ; about 119,600/λ(nm) kJ/mol.
• UV/visible: electrons; infrared: vibrations; microwaves: rotation; radio + magnet: nuclear spins.

Steps

1. A ladder of energies
2. Green light
3. Which light for which job?
4. An infrared photon