The transition through the wormhole is possible claims scientists. A physical object, a person, or even a spacecraft can make it through the wormhole says the physicists.
A wormhole is supposedly a connection between widely separated regions of space- time. It is believed by the fraternity of scientists and physicists that such a wormhole exists at the centre of the black hole.
The sci-fi movie Interstellar seems to be showing us the reality. Interstellar has a scene where astronauts try to hunt down another universe after the catastrophic effects of climate change destroy Earth. Physicists have produced a framework depicting the results of what would happen when a chair or a scientist or a spacecraft is struck inside the spherical of the wormhole.
Diego Rubiera-Garcia, one of the scientist from University of Lisbon explained, “What we did was to reconsider a fundamental question on the relation between the gravity and the underlying structure of space-time.”
Rubiera-Garcia further added, “In practical terms, we dropped one assumption that holds in general relativity, but there is no a priori reason for it to hold in extensions of this theory.”
Einstein has proposed a theory of relativity with regard to space- time. According to his theory of general relativity, there lies singularity at the centre of the black hole. Singularity is considered to be the point at which the forces of gravity are intense and where time and space effectively end.
As the object approaches the event horizon, it shall be crushed in one direction and stretched in the other direction. The presence of extreme tidal forces of gravity within the wormhole makes possible such crushing and stretching effect possible. For an object to reach the centre of the black hole without being destructed it has to be infinitely long and thin. This process is often termed as being “spaghettified beyond recognition.”
The assumption of the existence of the singularity at the centre of the black hole comes into question. The physicists from the University of Cambridge have recently argued that there is no clear reasoning on why the singularity has to exist at the centre of the black hole. They suggested that a ‘naked’ singularity could exist, which is not bound by an event horizon.
However, such questions shatter the physics on which analysis of this world is made. It shall leave no room for prediction. “And if general relativity breaks down, it would throw everything upside down, because it would no longer have any predictive power – it could no longer be considered as a standalone theory to explain the Universe,” said Saran Tunyasuvunakool, one of the team member.
Rubiera-Garcia’s team assuming that the stipulations of general relativity are not fixed have made a new and unique proposition. They argued that a finite sized wormhole replaces the singularity in the centre of the black hole. They have further proposed what would happen to objects or scientists or space crafts, referred as ‘observers’ in the wormhole.
Rubiera-Garcia explained, “Each particle of the observer follows a geodesic line determined by the gravitational field.” The geodesic line is simply the path in spacetime that a free-falling object follows. “Each geodesic feels a slightly different gravitational force, but the interactions among the constituents of the body could nonetheless sustain the body.”
The study made by Rubiera-Garcia is published in the journal Classical and Quantum Gravity, in which it is described that the time spent by a light ray in a round trip between two parts of the body is always finite.
The team of Rubiera-Garcia has stated, “Thus, different parts of the body will still establish physical or chemical interactions and, consequently, cause and effect still apply all the way across the throat of the wormhole.”
According to the assumption made by the Rubiera-Garcia and team, the wormhole at the centre of the black hole with finite radius can be crushed only as much as the size of the wormhole. In contrast to the process of ‘spaghettification’.
Thereby, through the assumption adopted by the Rubiera-Garcia and team believe that an object could survive through the wormhole and can travel to the other side of the universe if there is any.
Rubiera-Garcia and his team described, “For a theoretical physicist, the suffering of observers is admissible (one might even consider it part of an experimentalist’s job) but their total destruction is not.”
As Hawking said at a conference back in August 2015 about his solution to the information paradox: “The message of this lecture is that black holes ain’t as black as they are painted. They are not the eternal prisons they were once thought. … If you feel you are in a black hole, don’t give up. There’s a way out.”
The wormholes give us a hope to look into the future and possibly a universe that has not been conceptualised yet.