Relativity Variables: Velocity, Doppler-Bondi k, and Rapidity

Traditional presentations of special relativity place emphasis…

Relativity on Rotated Graph Paper

This Insight is a follow up to my earlier tutorial Insight (Spacetime…

Spacetime Diagrams of Light Clocks

We demonstrate a method for constructing spacetime diagrams for…

Time Dilation and Redshift for a Static Black Hole

The following is an overview of the time dilation and gravitational…

Neutrino Masses and Speed

It was hard to miss the 2011 OPERA neutrino speed measurement…