The Optical Nature Of The Spatial Scale Factor And The Observable Effect

Space scale factor is an important concept in physics. In this dissertation, with the application ofΠaxiom of dimension theory, a research has been made on the dimensionless dynamical continuity equation of perfect gas universe in agravitational field. First, we studied the dimensionless dynamical continuityequation of perfect gas in a gravitational field. With the space scale factor R(t) andξ=r/R as the only measuring basis, the gas density, intensity of pressure and velocity functionY(t,r) can be broken down to the self-similar form _Y(t,r) = y(ξ)Y₁(R) and obtained a series of solutions of the R(t) function. Asthe research went further, we came to see that we could apply the above study to perfect gas cosmos. And it shows that the gas density, intensity of pressure and velocity is self-similar in a perfect gas cosmos under gravity. Based on above, we were able to build a space scale factor function:R_B(t) = T₀(ε₀μ₀)^-1/2e^HBt. Hence, a perfect gas homogeneous universe - S_R(t,ξ,θ,(?)) can be worked out. Furthermore, we found that S_R(t,ξ,θ,(?)) is a typical homogeneous expanding coordinate and also proved that both Newtonian and general relativity space-time coordinate systems are just two extreme cases. Additionally, we were able to discover that Hubble's law, the background radiation of the cosmos, and the so called - accelerated expansion of universe supported by high-red-shift I a supernova can also be explained by S_R(t,ξ,θ,(?)). The equation of red shift with distance is presented, which lead us to prove the constraint of the coordinates S_R(t,ξ,θ,(?)) limited by the speed of light. Finally, we were able to see that the cosmos expanding effect is only the reflection of its intrinsic optical-observation nature.