Question

Is it possible to focus the radiation from a black body to make something hotter than that black body?

Answer 1

not practically And theoretically...it is impossible as black color absorbs the most of the light ..and it can't make anything hotter as in relation to the first line.


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Answer 2

All objects with a temperature above absolute zero (0 K, -273.15 oC) emit energy in the form of electromagnetic radiation. A blackbody is a theoretical or model body which absorbs all radiation falling on it, reflecting or transmitting none.