(3) The redshift
Suppose subscript ¡°1¡± represent ¡°2¡± represent the place of emitting photon and subscript ¡°2¡± represent the place of receiving photon. Thus redshift is defined as
Z>0 is the redshift, Z<0 the blueshift.
1) Velocity redshift
The velocity redshift is Doppler effect due to the velocity V between celestial bodies, we know that
and relativistic correction term of the Zv is
2) Repulsion redshift
Just as gravitation have an effect on light so repulsion have spectrum arise frequency shift. According to the law of conservation of energy we have
3) Total redshift
4) Maximum apparent redshift
When Zv=1 total redshift is
Zmax=1.5 + Ze
the maximum of redshift will have been determined by observation. If we can¡¯t find a greater redshift than some value, then this value that is Zmax. The last selection of cosmic parameter depend on Zmax.
to agreat extent.