**Sub-Category:**

Relativity Theory

**Date Published:**

May 21, 2016

**Abstract:**

Only now I have suddenly realized that, OF COURSE, if ct is the radius of the "lightsphere" in the "stationary" system, like the radius r of any sphere, though the r or ct may assume any value, by (orthodox) definition, that value is a constant. Therefore not only the c but also the t (of the stationary system) is a constant. All the SR equations for the x', ..., t', can be expressed in terms of functions of x,y,z only.

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