On the Change in Entropy Due to Accretion and Collision of Black Holes

International Journal of Applied Physics

© 2021 by SSRG - IJAP Journal

Volume 8 Issue 2

Year of Publication : 2021

Authors : Dr. Goutam Sarker

10.14445/23500301/IJAP-V8I2P102

How to Cite?

Dr. Goutam Sarker, "On the Change in Entropy Due to Accretion and Collision of Black Holes," SSRG International Journal of Applied Physics, vol. 8,  no. 2, pp. 5-15, 2021. Crossref, https://doi.org/10.14445/23500301/IJAP-V8I2P102

Abstract:

Inside of any event horizon of a Black Hole is totally a mysterious wonderful world. The singularity inside the event horizon is of infinite density and creates tremendously huge gravity. The gravity is so horribly huge that even light cannot come out from inside the event horizon to the outer world. So no information about the happenings inside the event horizon is available to the outer world. Although it is quite impossible to get information from inside the event horizon of any black hole, it is possible to predict and estimate a lot regarding the mysterious world inside the event horizon including the singularity at the center, with the help of general and special theory of relativity. In the present paper we discuss several issues. First of all we introduced the concept of computation of gravity at the juncture of Newtonian Gravitation and General Theory of Relativity. Secondly we discussed the different definitions of time and the definition of time inside the event horizon. Finally from the First Law of Black Hole Thermodynamics we showed how the accreted mass is absorbed in the form of decrease in entropy, increase in electrical charge, and increase in angular momentum and finally increase in effective mass of the black hole. This apparently indicates the fall of entropy and thereby a violation of Second Law of Black Hole Thermodynamics. We justified no violation of the law – not from the angle of Hawking Radiation or thermal evaporation of the Black Hole (which has to assume and impure system of central Black Hole and the surrounding thermal radiating particles) but from a complete different new logical concept of Entropy inside the event horizon of any Black Hole.

Keywords:

space time, world line, space time curvature, black hole, Schwarzschild Black Hole, Kerr Black Hole, event horizon, singularity, entropy, laws of black hole thermodynamics, Hawking Radiation

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