Question

A perfectly black body is one where

• A. absorptive power in infinity
• B. absorption point is 0
• C. emmissive power is 1
• D. absorptive power is 1

Answer 1

Answer: (D)

absorptive power is 1

Answer 2

A perfectly black body neither reflects nor transmit (i.e., $r=0, t=0)$ any part of the incident radiation energy but absorb whole of it or we can say its absorptive power is 1 .