What is the absorptivity of a black body?
Correct answer: A. 1
- A. 1
- B. 0
- C. 0.78
- D. 0.95
Explanation
A black body absorbs all incident radiation, so its absorptivity is unity. Its ideal absorptivity is therefore 1, not a fractional value such as 0.78 or 0.95.
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