50 years ago, physicists found the speed of light
Excerpt from the December 2, 1972 issue of Science News
In the 1970s, scientists measured the speed of light: 299,792.456 kilometers per second, or 299,792,456 meters per second. Fifty years later, they continue putting light through its paces.
Eduard Muzhevskyi/Science Photo Library/Getty
A New Figure for the Cosmic Speed Limit – Science News, December 2, 1972
A group at the National Bureau of Standards at Boulder, Colo.,