A solid maintained at t_{1}^{circ} C is kept | vedclass

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(B) According to the Stefan-Boltzmann Law, the rate of heat energy radiated by a body at absolute temperature $T$ is given by $P = \sigma A e T^{4}$.W

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$(t_{2}+273)^{4}-(t_{1}+273)^{4}$

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(B) According to the Stefan-Boltzmann Law, the rate of heat energy radiated by a body at absolute temperature $T$ is given by $P = \sigma A e T^{4}$.When a body at absolute temperature $T_{1}$ is placed in an enclosure at absolute temperature $T_{2}$, the net rate of heat exchange is given by $P_{net} = \sigma A e (T_{2}^{4} - T_{1}^{4})$.Here, the absolute temperatures are $T_{1} = (t_{1} + 273) \ K$ and $T_{2} = (t_{2} + 273) \ K$.Since the body is absorbing heat from the chamber, the rate of heat absorption is proportional to the difference of the fourth powers of their absolute temperatures.Therefore, the rate of heat absorbed is proportional to $(t_{2} + 273)^{4} - (t_{1} + 273)^{4}$.

$A$ solid maintained at $t_{1}^{\circ} C$ is kept in an evacuated chamber at temperature $t_{2}^{\circ} C$ $(t_{2} > t_{1})$. The rate of heat absorbed by the body is proportional to

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