%0 Journal Article
%T Null Geodesics, Raychaudhuri Equation, Trapped Surfaces, and Penrose Singularity Theorem
%A Miguel Socolovsky
%J Journal of High Energy Physics, Gravitation and Cosmology
%P 536-557
%@ 2380-4335
%D 2022
%I Scientific Research Publishing
%R 10.4236/jhepgc.2022.83039
%X We review the concept of congruence of null geodesics, the Raychaudhuri equation for the expansion, its harmonic oscillator version and associated ¡°quantum¡± propagator, the role of the equation in the derivation of the Penrose singularity theorem, the definition of trapped surfaces, and the derivation of the theorem itself.
%K Null Geodesics
%K Trapped Surfaces
%K Singularity Theorem
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=118124