286189
| Question | Answer |
| E | Emmissive Power Rate at which radiation is emitted from a surface per unit area σ(T^4) |
| G | Irradiation Rate at which radiation is falling on a surface per unit area |
| J | Radiosity Rate at which radiation leaves a surface per unit area |
| Net Radiative Flux | Net rate of radiation leaving a surface per unit area qrad=J-G |
| α | Absorbtivity: fraction of radiation absorbed |
| Roe | Refelectivity: Fraction of irradiation reflected |
| tau | Transmissitivity: Fraction of radiation trasnmitted |
| opaque material | no transmission tau=0 |
| Black body | Body for which all incident radiation is absorbed, and there is no reflection |
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