Net radiation between a small surface at T_s and a much larger surroun…

Question

Net radiation between a small surface at T_s and a much larger surrounding at T_sur is approximately:

Accepted Answer

B. {'text': "$q'' = \varepsilon\sigma(T_s^4 - T_{sur}^4)$", 'label': 'B'}

Surface-to-surrounding net radiation: $\varepsilon\sigma(T_s^4 - T_{sur}^4)$. Note BOTH temperatures appear to the FOURTH power; both must be in absolute (Kelvin) units.

Answer

{'text': "$q'' = \sigma(T_s + T_{sur})$", 'label': 'A'}

Answer

{'text': "$q'' = h(T_s - T_{sur})$", 'label': 'C'}

Answer

{'text': "$q'' = k(T_s^2 - T_{sur}^2)$", 'label': 'D'}