My Master's degree from Hebrew U is in General Relativity. Yes, I'm talking about momentum. Bodies are rarely at rest with respect to the instrument observing it.
Danny On 2/18/2013 12:52 PM, Yaakov Stein wrote: > 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
