Mr. Wall’s Painting Life

By Robert McGugan Those of you who have been in physics teacher, Mr. Wall’s, classroom may have seen some amazing paintings covering the walls. However, you may not know that he painted them himself. I recently interviewed Wall about these paintings. Wall said that he started painting in high school, when he took some classes …

Retroreflectance. How Does it Work? What Is It For?

By David Boles We’re all accustomed to mirrors in our bathrooms, on our cars and coating the Arena hotel. Their working principle is fairly simple. As light rays hits the surface, it bounces off symmetrically to the angle in which it came in: First developed commercially in the 1930s, retroreflective materials have gained wide prominence in …