How long does it take for a black hole to close?
A supermassive black hole with a mass of 1011 (100 billion) M ☉ will evaporate in around 2×10100 years.
Some monster black holes in the universe are predicted to continue to grow up to perhaps 1014 M ☉ during the collapse of superclusters of galaxies.
Even these would evaporate over a timescale of up to 10106 years..
Does time exist in a black hole?
Black holes do not exist where space and time do not exist, says new theory. (Phys.org) —The quintessential feature of a black hole is its “point of no return,” or what is more technically called its event horizon. … At least, this is what happens in traditional black hole models based on general relativity.
What is it like inside a black hole?
A black hole is a tremendous amount of matter crammed into a very small — in fact, zero — amount of space. The result is a powerful gravitational pull, from which not even light can escape — and, therefore, we have no information or insight as to what life is like inside.
Can time reverse itself?
It isn’t. There’s no fundamental law of nature that prevents us from un-breaking eggs. In fact, physics says that any event in our day-to-day lives could happen in reverse, at any time.
Why can’t we reverse time?
The Second Law of Thermodynamics allows for the entropy to remain the same regardless of the direction of time. If the entropy is constant in either direction of time, there would be no preferred direction. … T Symmetry is the symmetry of physical laws under a time reversal transformation.
Can we go back in time?
The Short Answer: Although humans can’t hop into a time machine and go back in time, we do know that clocks on airplanes and satellites travel at a different speed than those on Earth. That kind of time travel sounds like something you’d only see in movies or science fiction books. …
Does time go backwards in a black hole?
As black holes have the type of gravitational field that Engelhardt first describes – one that intensely pulls matter together, reaching a point of infinite density – they epitomize a past holographic screen. Therefore, inside the perpetually disappearing darkness of the black hole, time runs backwards.
What would happen if time ran backwards?
That means that it doesn’t matter whether time moves forward or backwards. If time ran in reverse, all the laws of physics would work the same. … It’s the only physical law that can’t go backwards.