Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site pur-phy.UUCP Path: utzoo!watmath!clyde!cbosgd!ihnp4!inuxc!pur-ee!CS-Mordred!Pucc-H:pur-phy!act From: act@pur-phy.UUCP (Alex C. Tselis) Newsgroups: net.physics Subject: Re: Question on FTL and quantum mechanics Message-ID: <1530@pur-phy.UUCP> Date: Fri, 30-Nov-84 02:37:34 EST Article-I.D.: pur-phy.1530 Posted: Fri Nov 30 02:37:34 1984 Date-Received: Sat, 1-Dec-84 05:58:14 EST References: <654@ames.UUCP> <6201@mcvax.UUCP> Distribution: net Organization: Purdue Univ. Physics Dept., IN Lines: 17 > ---------------------------------------------------------------------------- > How does one measure velocity? > Velocity is length divided by time, both quantities that behave 'stange' > under lorentz transformation (as does the mass). > The things that are quantized are the invariant quantities such as > impuls (=mass*velocity!) and energy. > Increasing the impuls with one quantum in order to try to increase the velocity > in the region of the speed of light does also increase the mass (remember?). > The closer one gets to the speed of light the more impuls will contribute > to the increase of mass. It is stated that impulse and energy are quantized and invariant. Really? Although momentum and energy are quantized for particles moving in certain kinds of potentials, this is certainly not always true. Furthermore, neither is a relativistic innvariant. In fact, the momentum and energy form the components of a four-vector, which has the same Lorentz transformation properties as any other four-vector, such as {x,y,z,t}.