Question

Fill in the blank.
For a perfectly black body, absorptive power is _______and _______.

• A. minimum, 1
• B. maximum, 1
• C. maximum, 2
• D. minimum, 0

Answer 1

Answer: (B)

maximum, 1

For a perfectly black body, absorptive power is maximum and $1$

The absorptive power of a black body is $1$ because it absorbs radiant energy of all wavelength incident on it. A good absorber is good radiator.