Last updated on April 18, 2014 at 17:24 EDT

Latest Physical constant Stories

2011-07-20 13:13:59

The electromagnetic force has gotten a little stronger, gravity a little weaker, and the size of the smallest "quantum" of energy is now known a little better. The National Institute of Standards and Technology (NIST) has posted the latest internationally recommended values of the fundamental constants of nature. The constants, which range from relatively famous (the speed of light) to the fairly obscure (Wien frequency displacement law constant) are adjusted every four years in response to...

2005-12-20 08:25:07

An international team of astronomers has looked at something very big -- a distant galaxy -- to study the behavior of things very small -- atoms and molecules -- to gain vital clues about the fundamental nature of our entire Universe. The team used the National Science Foundation's Robert C. Byrd Green Bank Telescope (GBT) to test whether the laws of nature have changed over vast spans of cosmic time. "The fundamental constants of physics are expected to remain fixed across space and time;...

2005-04-11 09:00:00

Scientists discover one of the constants of the universe might not be constant Physical constants are one of the cornerstones of physics -- sacred numbers which we know to be fixed -- but what if some of these constants are changing? Speaking at the Institute of Physics conference Physics 2005, Dr Michael Murphy of Cambridge University will discuss the "fine structure constant" -- one of the critical numbers in the universe which seems to be precisely tuned for life to exist...