IB Physics SL B.2.2 Emissivity
IB Physics SL B.2.2 Emissivity
Practise using emissivity in radiation models to calculate emitted intensity, compare surfaces and solve equilibrium temperature relationships.
How this is tested
- use I = eσT^4 to calculate emitted intensity, then find atmospheric back-radiation from energy balance
- compare two regions on a radiation diagram to decide which has greater emissivity when temperature is the same
- rearrange an equilibrium model with emissivity and albedo to solve for surface temperature or absorbed intensity