A black body is at 727°C. It emits energy at a rate which is proportional to
Text Solution
Verified by ExpertsThe correct answer is:
B
Amount of heat energy radiated per second by unit area of a black body is directly
proportional to fourth power of absolute temperature.
According to Stefan's law,
or 
where 
is constant of proportionality and called Stefan's constant. Its value is
Hence 
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