In 1996, the Niels Bohr Institute in Copenhagen turned 75. To mark the occasion the late Abraham Pais gave a talk at the institute entitled Physics in Denmark: The First Four Hundred Years. The talk is now available online thanks to the Nobel e-Museum.
To illustrate the effects of special relativity on photons, Leo Brewin of Monash University in Clayton, Australia, has put together Special Relativity and Photography. This online tutorial includes several instructive animations.
On vacation in Alaska, retired geophysicist David Stern heard a talk about the aurora borealis that was full of scientific errors and misconceptions. As a corrective, he wrote and delivered Secrets of the Polar Aurora , which is now available on the Web.
To suggest topics or sites for Web Watch, please visit http://www.physicstoday.org/suggestwebwatch.html.
Compiled and edited by Charles Day
