Dear members,
I have read about some information on the Internet regarding the Lorentz contraction factor.
It can be said that photo-sphere is the most significant region of black holes in the Universe. For Lorentz contraction factor Beta on the photo-sphere it must hold
Beta = (1 - v ^2 / (c ^2) ) ^ (1/2) = 0.57735
Some sources suggest that it is the Euler-Mascheroni constant.
I am interested in the background or deduction of that factor, i.e., the previous expressions or analysis around that factor.
Best regards,
Carlos