A²
P = 2 -- cos² Φ
8π
which is in accordance with facts, and with other theories.
All problems of optics of moving bodies can be solved after the method
used here. The essential point is, that the electric and magnetic forces
of light, which are influenced by a moving body, should be transformed
to a system of co-ordinates which is stationary relative to the body. In
this way, every problem of the optics of moving bodies would be reduced
to a series of problems of the optics of stationary bodies.
§ 9. Transformation of the Maxwell-Hertz Equations.