Across
- 4. Microwave radiation makes a molecule do this
- 5. The technique for studying absorption of EM radiation
- 7. The length between two peaks of a wave
Down
- 1. The separation of energy into discrete levels
- 2. The radiation that causes a molecule to vibrate
- 3. A particle of light
- 4. An atom or molecule with unpaired electrons
- 6. The constant relating energy with the frequency of light
- 8. The unit of frequency