Active and Reactive Mass

Action and reaction forces are unequal because they are caused by waves undergoing the Doppler effect. The Doppler effect in wavelength is 1+B backward and 1–B forward. The ratio is the same for action and reaction forces and for the Doppler effect.

The gamma factor:
ϒ =  1/(1–B2
can also be deduced from the Doppler effect:
= (a+r)/m
The mass gain according to:
ϒ* m– m
is also given by:
a + r – m
in accordance with the Doppler effect.