He says that Power net=EKA(T(adsbygoogle = window.adsbygoogle || []).push({}); ^{4}-T_{o}^{4})

Where Power net= net power loss or gain through radiation

E- Emmisivity of a body

K- Stefans constant

A-Surface Area of the radiating body

T-Temperature of a body

T_{0}- Temperature of the surrounding

And Power net=Power gained - Power loss

Now a question!!

How can we say that heat gained by the body is also given by the emissivity of the body and its surface area while its the surrounding that's radiating to the body!

What I mean is, we where supposed to use the emissivity of the surrounding etc...

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# Stephan's law on heat

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