Please note that E = mc^2 is a first-order approximation so be careful about this.
Danny On 2/12/2013 12:23 PM, Yaakov Stein wrote: > Hi all, > > > > We all know that in relativity theory E = m c^2 > > and that in quantum mechanics E = h f (where f is the wave frequency), > > so that a mass m corresponds to a frequency f = m c^2 / h (called its > Compton frequency). > > > > However, until now it has not been practical to directly relate > frequency and mass, > > because c^2/h is just too big. > > > > Well, in a new article > _http://www.sciencemag.org/content/339/6119/554.abstract_ > > researchers from Berkeley have been able to build a clock with an > accuracy of E-9 > > that directly connects mass and frequency. > > Eventually this may lead to linking the definitions of the second and > the kilogram. > > > > Y(J)S > > > > > > _______________________________________________ > TICTOC mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/tictoc > _______________________________________________ TICTOC mailing list [email protected] https://www.ietf.org/mailman/listinfo/tictoc
