A white hole is a theoretical structure that is the opposite of a black hole in terms of its properties. It is an imaginary concept that goes against the laws of physics, but scientists predict it to exist due to the symmetry in the mathematical equations. In this article, we will explore the concept of a white hole and how it works.
Understanding Black Holes
Before delving into what a white hole is, we must first understand black holes as white holes are their theoretical counterparts. Black holes are structures in space with immense gravitational pull. They are formed when a massive star runs out of fuel and collapses into itself, causing its gravity to become too immense for anything to escape, including light. Black holes are essentially a point in space where the gravitational pull is infinite and allconsuming. Any matter that enters a black hole is sucked into it, and its corresponding energy gets added to the black hole’s mass, causing it to grow.
Theoretical Predictions of White Holes
In theoretical physics, every solution that works one way must have a solution that works the opposite way. This is known as the symmetry of the equations. Therefore, if black holes exist, then according to mathematical symmetry, there must be a white hole that exists as well. A white hole is like a mirror image of a black hole. It is a structure with immense outward pressure where nothing can enter but can only exit. Anything that enters a white hole is expelled with tremendous force, and its energy is released.
Properties of a White Hole
No Information Can Enter a White Hole
A white hole is defined by the fact that it only releases energy and does not absorb any matter or energy. This means that nothing can enter a white hole, including information. Information from the universe cannot enter a white hole, and therefore nothing inside it can be known. This means that the idea of a white hole being a wormhole, a structure that connects two different parts of the universe, is highly unlikely.
No Event Horizon in a White Hole
The event horizon is a boundary that surrounds a black hole beyond which the gravitational pull is too immense for anything to escape called the point of no return. However, a white hole does not have an event horizon because nothing can enter it, so there is no need for it to have a point of no escape.
Outward Energy Emanates from a White Hole
The energy that enters a white hole is not absorbed; instead, the energy is released with tremendous force. Therefore, a white hole’s defining characteristic is that it continuously releases immense energy into space.
The Probability of White Holes Existing
White Holes Based on Mathematical Symmetry
The existence of white holes is based on the mathematical symmetry that black holes have. It is a theoretical prediction, and there has been no empirical evidence to support their existence. Scientists believe that if they do exist, they exist in a parallel universe.
The White Hole is a Theory and Not Observable
White holes are a theoretical construct that is yet to be observed because they violate the laws of physics in our current understanding of them. Therefore, they are not detectable yet and remain a theoretical theory until further experimental evidence is observed.
Wrapping Up
A white hole is a theoretical structure that is the opposite of a black hole. It is defined as having only outwardgoing energy, and nothing can enter it due to its immense gravitational pressure. Although white holes remain theoretical constructs, their existence is a mathematical prediction based on the symmetry of equations that govern black holes.
FAQs

Q: Can white holes be observed?
A: No, white holes cannot be observed as they are a theoretical construct that remains unproven. 
Q: Are white holes related to wormholes?
A: There is no evidence that white holes are wormholes, which are structures that connect two parts of the universe. 
Q: Was a white hole ever observed?
A: No white hole has ever been observed as it remains a theoretical construct. 
Q: What is the difference between black and white holes?
A: A black hole is a structure that absorbs matter and energy, while a white hole only releases energy and does not allow matter or energy to enter.
References:
 Penrose, R. (1973). “Naked singularities”. Annals of the New York Academy of Sciences. 224 (20):125–134.
 Wheeler, John Archibald (1957). “On the nature of quantum geometrodynamics”. Annals of Physics. 2 (6): 604–614.
 Komissarov, S. S.; Gutiérrez, L. (2017). “The physics of black hole jets”. International Journal of Modern Physics D. 26 (11): 1730025.