This can be written as:
\[P = \varepsilon \sigma A T^4\]
where:
- \(P\) is the power radiated,
- \(\varepsilon\) is the emissivity of the body (dimensionless),
- \(\sigma\) is the Stefan-Boltzmann constant (\(5.67 \times 10^{-8} \, \text{W m}^{-2}
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