Citation :

Goutam Sarker, "Inside the Event Horizon of a Black Hole – A Visible Movement through 1D Space Like Time," International Journal of Applied Physics, vol. 13, no. 2, pp. 17-26, 2026. Crossref, https://doi.org/10.14445/23500301/IJAP-V13I2P102

Abstract

In the present paper, we are mainly focusing on the inversion of the role of space and time inside the event horizon of any black hole. Inside the event horizon, all the world lines are only directed towards the singularity. As a result, every particle has to move towards the singularity – the only destination and destiny, without any deviation in any other direction. Outside the event horizon of the black hole, everywhere, we are aware that the arrow of time is in the forward direction from past to present and from present to future, and we cannot avoid this movement through time. So, there is a clear analogy between our unidirectional movement through ‘time’ from present to future outside the event horizon and the unidirectional movement of any particle through ‘space’ from the interior surface of the event horizon towards the singularity. Only the difference between them is that our motion through 1D ‘time’ outside the event horizon is invisible. In contrast, the motion of any particle through 1D ‘space’ inside the event horizon is quite visible. Because of this analogy, the inevitable movement of the particle inside the event horizon is ‘time-like’ movement – as if the particle is moving through time from any present to the future, which is the only destination and destiny and which is nothing but the singularity. Therefore, the role of space and time is interchanged there. We have established this inversion of the role of space and time logically as well as mathematically. As a prerequisite, we discussed briefly at the beginning, spacetime and spacetime curvature, straight path movements of planets and stars, spacetime interval and light cone, the ever constant speed of light, strongest spacetime curvature inside the event horizon.

Keywords

Black Hole, Event Horizon, Singularity, Time Dilation, Spacetime, Curvature Of Spacetime, Spacetime Interval, Light Cone, Time Like Space, Space Like Time.

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