| Velocity of A with respect to C |
= | Velocity of A with respect to B |
+ | Velocity of B with respect to C |
| __________________________________ | ||||
| reduction factor | ||||
where
reduction factor =
1 + (Velocity of A with respect to B/c) x (Velocity of B with respect to C/c)
Here's how the reduction factors for boosting light are computed. Take the simple case of composing 0.1c with c. the reduction factor is
1 + (0.1c/c)x(c/c) = 1 + (0.1)x(1) = 1.1
The other cases in the main text are computed correspondingly.