Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity?
A)Aluminium foil
B)Refractory bricks
C)Iron plate
D)Coke breeze

Question

Quizplus · Accepted Answer

Coke breeze has the maximum absorptivity among the given options because it is closer to a black body in terms of its ability to absorb radiation. Black bodies and materials that are dark and rough tend to have higher absorptivity, making coke breeze, which is a carbonaceous material with a dark surface, the best candidate for high absorptivity.

Absorptivity of a Perfect Black Body Is Unity