Black holes seem to be getting all the attention. What about mirror twins, white holes? Do they exist? And if so, where are they? understanding nature white holeswe must first examine the much more familiar black holes. black holes are regions of total gravitational collapse where gravity overpowers all other forces in the universe and compresses the heap of material to an extremely small point known as the singularity. around this singularity event horizonit’s not a physical hard boundary, it’s just a boundary around a singularity where gravity is so strong that nothing, not even light, can escape.

We know How black holes form in the universe. When a massive star dies, its enormous weight presses on its core, causing a black hole to form. Any matter or radiation traveling very close to a black hole is captured by the strong. gravity and dragged under the horizon of events until the final death.

We understand this process of black hole formation and how black holes interact with their environment through general relativity. Einstein. To arrive at the concept of a white hole, we must admit that general relativity is not concerned with flow. time. The equations are time symmetrical, so math works just fine when going forward or backward in time.

So if we videotape the formation of a black hole and play it in reverse, we find an object emitting radiation and particles. Eventually it will explode and leave a big star behind. This is a white hole, and according to general relativity such a scenario is perfectly normal.

White holes would be even stranger than black holes. Yet they will have singularities at their center and event horizons at their borders. They will still be large, gravitational objects. But any material falling into a white hole is instantly ejected at speeds greater than the speed of light, causing the white glow to glow violently. Anything outside the white hole can never get into it because it has to move faster than speed. lightto move inward from the event horizon.

But if the mathematics of general relativity allows white holes, why don’t we suspect that they exist in the real universe? The answer is that general relativity is not the only word for space. There are other branches of physics that tell us the inner workings. Universelike our theories of electromagnetism and thermodynamics.

There is a concept in thermodynamics. entropyroughly speaking, it is a measure of disorder in the system. The second law of thermodynamics tells us that the entropy of closed systems can only increase. In other words, confusion is always growing.

As an example, let’s say you throw a piano into a wood chipper. A pile of shredded garbage comes out of it. The disorder in the system increased and the second law of thermodynamics was fulfilled. But if you throw a bunch of random pieces into the same wood chipper, you won’t get a fully formed piano because that will reduce clutter. (Highly ordered systems like life, Soilbut this happens by increasing the entropy inside the Sun.. No matter how you set up your system, you can’t buy a piano from wood chippers.)

We cannot reverse the black hole formation process and get a white hole, as it will reduce entropy. stars strangely, it does not arise as a result of giant cosmic explosions. Thus, while general relativity is agnostic about the reality of white holes, thermodynamics rejects this concept.

The only way to create a white hole was if an exotic process was at work in the early universe that transformed the existence of the white hole into the fabric of space-time. In this way, the process of white hole formation can bypass the problem of decreasing entropy – the white hole will simply be there, existing since the beginning of time.

Unfortunately, white holes will also be supremely unstable. They will still pull the material, but nothing will cross the horizon of events. Anything, even a single photon (particle of light), is doomed to disappear as soon as it approaches the white hole. If the particle approaches the event horizon, it cannot cross it and sends the system’s energy into the sky. Eventually, the particle will have so much energy that it will cause the white hole to turn into a black hole and cease to exist.

So, as amusing and mind-blowing as white holes may seem, they are not properties of the real universe; only ghosts haunt the mathematics of general relativity. Source