3 papers
gr-qc2026
Relativity for Retired Engineers
David Garfinkle
We provide some guidance and examples to clear up common misconceptions about special relativity. These misconceptions often come from trying to express the truths of special relat…
gr-qc2026
The radiation zone in general relativity
David Garfinkle
The radiation zone in electrodynamics is the region far enough away from the charges that the part of the field dominates over the piece. This concept is key in exp…
gr-qc2026
Relative velocity in special relativity and quantum field theory
David Garfinkle
A derivation of the relative velocity used in the definition of the relativistic cross-section is given in terms of manifestly Lorentz invariant quantities. Along the way we find t…