Which of the following figure represents a black body?

Question

Which of the following figure represents a black body? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

A cavity with a tiny hole, that has no other opening, can be considered as a black body. A ray of light entering the hole would be reflected by the walls of the cavity and ultimately absorbed by it.

Q. Which of the following figure represents a black body?

A cavity with a tiny hole, that has no other opening, can be considered as a black body. A ray of light entering the hole would be reflected by the walls of the cavity and ultimately absorbed by it.