Donald Schoolmaster (Dept. of Chemistry) 10/06/2000
OK, Why don't all the words flip over when I look at them through the water filled tube? A tube full
of water acts just like a lense. It will invert (flip) things upside down. But why don't ALL the words
flip when you look through the glass? They do, it just doesn't look like it because some letters look
the same upside down as they do rightside up (symmetry).
