I teach physics, and I love the Hafele-Keating experiment as a way to introduce relativity. Because the experiment has a lot of charisma, it's cool to be able to show students photos of the men and the clocks aboard the plane. The general relativity text by Hartle had a photo that he claimed was of Hafele and Keating boarding a plane, but it turns out that that was a mistake. Some actual photos from the experiment have been available online for a while, but they were low resolution. I've obtained and scanned copies of these at higher resolution and posted them here: http://www.lightandmatter.com/article/hafele_keating.html
The copyright status of these photos varies, and in some cases is difficult to determine. I've given what information I had on the web page. I'm in the U.S., where we have a pretty good fair use exception to copyright, and for the photos that are copyrighted, I think I have an excellent fair-use claim. I would be grateful to anyone who could e-mail me with any of the following: -any biographical information about Hafele or Keating, and contact information if they are still living -related historical photos that are in the public domain and of high educational or historical interest -information about the copyright of the photo that appeared in Popular Mechanics Is anyone on this list old enough to have been involved in relativistic atomic clock experiments from that era? Regards, Ben Crowell _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
