PIRA: 6B40.20


 Lab Equipment  Directions
  1. 2 black index boxes with a hole in end
  1. Have students look at the hole in the end of the box. Which looks blacker, the box or the hole?
  2. Do you see any significant different in the blackness of the holes in the two boxes? Open the boxes to show that one box is white on the inside (the other is black).