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Q. If an object at absolute temperature $(T)$ radiates energy at rate $R$, then select correct graph showing the variation of $\log _{e} R$ with $\log _{e}(T)$.

Thermal Properties of Matter

Solution:

$R=e A \sigma T^{4} $
$\log _{e} R=e A \sigma \times 4 \log _{e} T$
directly proportional.