# Electronic Spectra & Franck-Condon

Canonical: https://manyspace.aporia.systems/topics/electronic-spectra-franck-condon-phy-molec-136
Updated: 2026-10-13

Physics · Molecular Physics · PHY-MOLEC-136

- Difficulty: 4 / 5
- Importance: 4 / 5
- Study time: 6.5–11.5 h

vibronic transitions, dissociation

## Why it matters

Explains how atoms bind into molecules and why molecules have characteristic spectra — the bridge from atomic to condensed-matter physics.

## Where it is used

Molecular spectroscopy, atmospheric science, laser chemistry, biomolecular physics, photonics.

## How you know you have learned it

Explain/derive key result from memory + solve 2 non-routine checks.

## What you need first

- [Hydrogen Fine Structure](https://manyspace.aporia.systems/topics/hydrogen-fine-structure-phy-atomic-124) (required)

## Resources

- Molecular Physics (Demtroeder) — Wolfgang Demtroeder