A perfect black body is one that_____________?
Correct answer: B. absorbs all incident radiations
- A. transmits all incident radiations
- B. absorbs all incident radiations
- C. reflects all incident radiations
- D. absorbs, reflects and transmits all incident radiations
Explanation
A perfect black body absorbs 100% of the radiation incident on it, so its absorptivity is unity. It therefore neither reflects nor transmits that incident radiation.
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