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Black Hole: Why we are not able to detect anything escaping it

Author Affiliations

  • 1Nagaland, India

Res. J. Physical Sci., Volume 8, Issue (1), Pages 11-13, February,4 (2020)

Abstract

This paper is a theoretical approach, basing on Special and General Theory of Relativity, about why we cannot detect a particle (or an object) escaping a black hole and what will happen to it after escaping the gravitational field of the black hole. From Einstein′s relativity we know that time is affected by both the speed at which an object is moving as well as gravity. The faster it moves the slower is the time; and the more the gravity the slower is the time. If we consider a spaceship moving around a black hole, then, from the ship′s perspective time will be slowed down as compared to an observer on earth owing to the massive gravity of the black hole. In order to escape the black hole, the ship has to gain speed which will result in time to slow down further. Thus, the time elapsed for an observer onboard the ship will be much shorter as compared to an observer on earth. This will bring us to a point in time where the time difference between the two observers will be so large that the ship will be moved into the future and this point will appear as an illusion, to the observer on earth, as if the ship has been sucked in by the black hole. Thus, we cannot detect an object escaping a black hole because in reality it has travelled through time.

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