Danny Are you talking about quantum corrections (zero-point energy), or GTR corrections, or about taking STR momentum into account?
Assuming the latter E = m c^2 is correct (NOT an approximation) where m is the rest mass, i.e., we are measuring the energy in the inertial system where the mass is at rest. For an inertial system in which the mass has momentum, you have to appropriately add the momentum p. i.e., E = sqrt( (mc^2)^2 + (pc)^2 ) . Y(J)S -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Danny Mayer Sent: Tuesday, February 12, 2013 20:08 To: [email protected] Subject: Re: [TICTOC] new type of atomic clock 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 _______________________________________________ TICTOC mailing list [email protected] https://www.ietf.org/mailman/listinfo/tictoc
