What is stefans law - Definition and Meaning
Stefans Law :
Stefan's law states that the total amount of heat energy radiated per second per unit area of a perfect black body is directly proportional to the fourth power of its absolute temperature.
Formula :
E α T4 or E = σ T4
σ = Stefan's constant ( 5.67 * 10-8 W m-2 K-4)
Example :
The sun's surface temperature is 4500K.
How much power is radiated by one square meter of the sun's surface?
Temperature (T) = 4500k
Radiant Energy (E) = 5.67 * 10-8 * 4500
Radiant Energy (E) = 23250543.75
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