Black body temperature to emit radiant energy - Heat Transfer

Q.  What should be the temperature of black body to emit radiant energy which is independent of the conditions in the surroundings?
- Published on 11 Aug 15

a. temperature of black body should be less than zero
b. temperature of black body should be more than zero
c. temperature of black body should be equal to zero
d. all of the above

ANSWER: temperature of black body should be more than zero

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