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physics.ed-ph1998
Ruler-changes and Relative Velocity
Eric Baird
Simple signal-propagation effects make receding objects seem contracted and approaching objects seem elongated. These effects are theoretically photographable, and are proportional…
physics.ed-ph1998
Superluminality and Pair-Production
Eric Baird
When an information-carrying lightbeam is (legally) swept across a surface at more than c, simple signal-propagation arguments allow the observed behavior of the moving image (or "…
physics.ed-ph1998
Aberration and Special Relativity
Eric Baird
Section 7 of Einstein's 1905 electrodynamics paper gives frequency-shift and aberration formulae that together describe an elongated ellipsoidal wavefront. A Lorentz contraction of…