A) \[W{{m}^{-2}}{{K}^{-1}}\]
B) \[W{{m}^{2}}{{K}^{-4}}\]
C) \[W{{m}^{-2}}{{K}^{-4}}\]
D) \[W{{m}^{-2}}{{K}^{4}}\]
Correct Answer: C
Solution :
Stefan?s law is \[E=\sigma ({{T}^{4}})\Rightarrow \sigma =\frac{E}{{{T}^{4}}}\] where \[E=\frac{Energy}{Area\times Time}=\frac{Watt}{{{m}^{2}}}\] \[\sigma =\frac{Watt-{{m}^{-2}}}{{{K}^{4}}}=Watt-{{m}^{-2}}{{K}^{-4}}\]
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