Slow, Stopped, Fast, and Backwards Light

The great contemporary physicist Richard Feynman won the Nobel Prize in Physics in 1965 for his work on the highly abstract quantum theory of photons, but he is also credited with drawing attention to nanoscience, a field with widespread application. He did that in a famous address he made in 1959 called “There's Plenty of Room at the Bottom”, referring to the fact that the science and technology at very small scales would be of immense fundamental interest and great practical importance — as of course has proven true in the active field of nanotechnology…