Heat and Mass Transfer

Two large parallel black plates are maintained at absolute temperatures $T_1 = 400\text{ K}$ and $T_2 = 300\text{ K}$. With Stefan-Boltzmann constant $\sigma = 5.67 \times 10^{-8}\text{ W/(m}^2\cdot\text{K}^4)$, the net radiative heat flux between the plates ($q/A = \sigma(T_1^4 - T_2^4)$) is closest to:

Options:

• (A) $\approx 992\text{ W/m}^2$
• (B) $\approx 1450\text{ W/m}^2$
• (C) $\approx 450\text{ W/m}^2$
• (D) $\approx 2200\text{ W/m}^2$