Hc-3 Black Body Box
Published: Monday 13 March 2006 - Updated: Monday 28 March 2011
To illustrate an approximate black body absorber.
Prepared box as in diagram
Click on pictures to enlarge.
A light tight box has two identical holes in one face. One of the holes is backed by a black piece of paper, the other with no backing appears much darker. The box may be opened to show that the inside has a white coating.