For a black body at temperature 727°C, its radiating power is 60 watt and temperature of surrounding is 227°C. If temperature of black body is changed to 1227°C then its radiating power will be-
Text Solution
Verified by ExpertsThe correct answer is:
B
Radiating power of a black body
where 
is known as the Stefan-Boltzmann constant, A is the surface area of a black body and 
is the temperature of the black body and 
is the temperature of the surrounding.
In the second case, 
be the radiating power.
… .(ii)
From (i) and (ii) we have
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