B.2.8—Infrared absorption Topic Practice
B.2.8—Infrared absorption Topic Practice
Practise explaining how outgoing infrared is absorbed by greenhouse gases and how the returned radiation changes labelled energy flows.
How this is tested
- state that outgoing infrared is absorbed when photon energy matches molecular energy levels or vibration modes
- use a labelled flux such as I2 on an energy diagram to predict that more greenhouse gas makes I2 increase
- separate Earth's infrared absorption/re-radiation from reflection of incoming solar radiation