White holes: theoretical opposite black holes.

 White holes are theoretical objects or the opposite versions of the black hole. The white hole is the point where particles come out from the theoretical tunnels through the universe called a wormhole. And "white color" of that object is caused by slowing particles that are coming out from the white hole. 

When those particles come out from the wormhole. They must slow their speed. And that thing causes a situation where those particles send radiation. But still today the white holes are theoretical objects as well as gravitational wormholes. The fact is that nobody could ever travel in the white hole. 

The radiation that comes out from that object makes it impossible. So the only way how to benefit wormholes in interstellar travel is to drive the craft in them by using black holes that are another side of the wormhole. There is a possibility that energy that comes out from the white hole can use to stop the aging of particles and the crew of the craft. 

In wormhole theories, there are black holes that pull material into wormholes. And white holes are points where those particles come out from the wormhole. In some other models of those theories, white holes are objects that are forming at the points where material falls from the fourth dimension or the material's energy level decreases so much that it can interact with the material in the third dimension. So when the material's energy level decreases it sends radiation. 

"When matter collapses, it can inevitably form a black hole. Roger Penrose was the first to work out the physics of spacetime, applicable to all observers at all points in space and at all instants in time, that governs a system such as this. His conception has been the gold standard in General Relativity ever since" (BigThink/Ask Ethan: What are white holes, and do they really exist?)

As well as there are electromagnetic and acoustic wormholes and black holes, electromagnetic and acoustic white holes exist. Those acoustic and electromagnetic white holes are the points where the tunnel through a medium like water suddenly ends. 

Electromagnetic wormholes are a reality. The X- and gamma-ray radiation that comes from the black hole are making the electromagnetic channel through the universe. Electromagnetic wormholes can stop time in particles. And that thing means. That they are the same way interesting as still theoretical gravitational wormholes. 

But then we can think that electromagnetic white holes are the same way possible. And actually, electromagnetic white holes are quite easy to make. The only thing that is needed is the tunnel through the medium where light travels faster than usual. Then the end of that tunnel will be closed very soon. 

The acoustic systems can make electromagnetic white holes in the water. The system creates a tunnel through the water, and then ion or electron cannon shoots an ion or electron through that tunnel. The electron travels faster than in that tunnel or channel it travels faster than light travels in water. When that particle impacts with water that is blown through that tunnel it sends radiation. 

Researchers can use acoustic and electromagnetic wormholes and electromagnetic white holes in space engineering. The idea is that the laser or some other system makes an electromagnetic wormhole in the rocket engine. Then ion cannon shoots ions through that channel and then the side coming hydrogen will suddenly close that channel. The effect causes a situation in that slowing ions will send radiation to the medium and causes its expansion. 

The real white hole could give a rocket ability to travel between stars. The wormhole between black holes and white holes will pull to the rocket engine's combustion chamber. Then that system uses the energy that comes out from the white hole to transport craft forward. 

https://bigthink.com/starts-with-a-bang/white-holes-exist/