What is relativistic mass and why it is not used much?
Aug 9, 2015 · The concept of relativistic mass In special relativity, the expressions for the total energy and momentum of an object can be written as where and is the invariant mass (or rest mass) of the …
Best book on relativistic QM and QFT - Physics Forums
Sep 25, 2017 · I loved Modern Quantum Mechanics by Sakurai, where Quantum Mechanics is presented and worked out. Now I would like to proceed further, and learn about Relativistic Quantum …
Klein-Gordon equation in the nonrelativistic limit - Physics Forums
6 days ago · I am reading Relativistic Quantum Mechanics Wave Equations, 3rd ed. - W. Greiner and I'm on section 1.3 looking at a solution ##\psi## to the Klein-Gordon...
How to fix Relativistic QM so it's consistent? - Physics Forums
Oct 25, 2025 · What attempts have been to resurrect RQM (in order to ditch the fields' notion)? Besides the appearance of negative energies (which I guess it's a blasphemy in physics), what other issues …
How Does Newton's Second Law Adapt to Relativistic Speeds?
May 7, 2007 · In Newtonian Physics, a force on a object is equal to its mass times acceleration. This is Newton's Second Law. But in relativity, when the acceleration approaches the speed of light, …
The Schrödinger equation as the non-relativistic limit of the Dirac ...
May 18, 2012 · The discussion centers on the relationship between the Schrödinger equation and the Dirac equation, specifically how the former can be derived as a non-relativistic limit of the latter. It …
Addition of Velocities (Velocity Composition) in Special Relativity
May 20, 2024 · then do the special-relativistic analogue, then do the Galilean analogue (to obtain the familiar but unfortunately-“our common sense” formula). In response to “Construct a Diagram that …
Relativistic vs. non-Relativistic Space-Time Perspectives Relativity equations examine Relativistic distortions from one perspective, the
What is the correct derivation of the relativistic rocket equation?
Sep 20, 2005 · I'm trying to derive the relativistic rocket equation, and I'm getting two different answers depending on the method I use. I think the first method is...
How Fast Do Spaceships Appear to Each Other at 0.99c Relative Speed?
Aug 4, 2007 · An observer sees two spaceships flying apart with speed 0.99c, what is the speed of one spaceship as viewed by the other? the answer is: 0.99995c. well...