Sushiksha

Everything in this universe has its own opposite. That's something which Sir Issac Newton put forward in his laws of motion stating 'Every action has an equal and opposite reaction.' Is this true concerning everything? Of course yes. Even microscopic matters hold good with this. But do we have proof? We do have but mathematically. One such thing is a white hole. 

What is a White hole?
Hypothetically, white holes are the exact opposites of black holes. Nothing enters it but everything comes out. In simpler terms, everything is outwards.  This also leads to speculation if black holes and white holes together make a wormhole(You'll get a post soon on this as well). 

How are they formed?
I don't know. In fact, no one knows how are they formed because humankind has never witnessed one. Years ago, we figured out that a black hole exists, and recently we got a photograph of the same. So for white holes, we have no clue. But according to Einstein's theory of relativity, if at all time moves forward, it has to move backward as well for which we have no evidence in the universe. This can be true in the case of a white hole. While at one point it seems logical, if we consider the big bang to be the result of a white hole, we're completely wrong. This leaves one way for the formation of a white hole; The black holes.

Understanding the formation of a black hole
Black holes are formed as a result of the death of a live star. Once a star gasses out, the only force which acts on it is the inward gravitation of the star itself. This results in a size reduction of the star and the gravitational force increases by millions. After this, all that this object does is swallow everything that comes nearby including light. We don't know what exactly happens after enough swallowing. This might be a way how the white holes are formed. Everything that's swallowed might be thrown out in the same fashion because we know matter can neither be created nor be destroyed. It can only be converted from one form to another. 


Does this mean they exist?
This theory does not hold good as well. From the second law of thermodynamics, we know entropy can either be constant or increase in a system. In the case of a white hole, the entropy decreases violating the law of thermodynamics. If at all it's possible, we don't know a law that satisfies such a condition. All these cases make it possible for a white hole to be existing only in mathematical equations and nowhere else. 

What do you think? Do they exist? Let me know in the comment section.