According to Stefan’s law how much more radiation – per square meter, say -?

Question by : According to Stefan's law how much more radiation - per square meter, say -?
According to Stefan's law how much more radiation - per square meter, say - is emitted by Venus's surface at 730K than is emitted by Earth's surface at 300 K?

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Answer by Roger
A body will radiate energy = T^4 where T is the temperature in Kelvin. Venus will emit (730/300)^4 or 35 times the radiation that Earth emits.

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