Glowing Molecules

Fluorescence and chemiluminescence

An interactive lesson with 5 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

• Fluorescence: absorb, lose a little energy, emit at a longer wavelength.
• Chemiluminescence: a reaction supplies the excitation energy.

Steps

1. In blue, out green
2. Where the energy goes
3. Energy lost
4. Invisible to visible
5. Light without light