Questions
A black body is at a temperature 300 K. It emits energy at a rate, which is proportional to
detailed solution
Correct option is A
From Stefan's law the total radiant energy (E) emitted per second per unit surface area of a black body is proportional to the fourth power of the absolute temperture (T) of the bodyi.e., E = σT4where σ is Stefan's constantHence, E directly proportional to (300)4Talk to our academic expert!
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For a black body at temperature 727°C, its radiating power is 60W and temperature of surrounding is 227° C. If temperature of black body is changed to 1227°C, then its
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