What happens to space-time in a black hole?

What happens to space-time in a black hole?

Near a black hole, the slowing of time is extreme. From the viewpoint of an observer outside the black hole, time stops. According to Einstein’s theory, time and space, in a way, trade places inside the hole. Inside the black hole, the flow of time itself draws falling objects into the center of the black hole.

Is a black hole a Planck length?

Observationally, the lightest black hole candidates are about six solar masses. Such a density would have been enough to create black holes a mere 1035 meter across (a dimension known as the Planck length) with a mass of 108 kilogram (the Planck mass).

What happens inside a black hole singularity?

The singularity at the center of a black hole is the ultimate no man’s land: a place where matter is compressed down to an infinitely tiny point, and all conceptions of time and space completely break down. And it doesn’t really exist.

What is the shape of spacetime around a black hole?

In this image, spacetime is represented on a two-dimensional surface, but in actuality a black hole is a three-dimensional object/event, and thus spacetime curves around a sphere, rather than acting like a funnel, well, or cone.

How does a black hole destroy space?

While black holes are mysterious and exotic, they are also a key consequence of how gravity works: When a lot of mass gets compressed into a small enough space, the resulting object rips the very fabric of space and time, becoming what is called a singularity.

Why does time pass slower near a black hole?

An object approaching the event horizon would appear to be slowing down as it approaches the black hole instead of speeding up as we would expect. This is because of time dilation, which slows the passing of time for an object moving close to the speed of light with respect to an outside observer.

What happens to space time when the mass is increased?

This effect is known as “gravitational time dilation”. Gravitational time dilation occurs because objects with a lot of mass create a strong gravitational field. The gravitational field is really a curving of space and time. The stronger the gravity, the more spacetime curves, and the slower time itself proceeds.

Is a singularity the size of a Planck length?

This means they must have either infinite mass or be infinitely small. Since we know singularities have mass (they lose it via Hawking radiation), they must be infinitely small, which is most definitely below the Planck length.

Where does matter in a black hole go?

singularity
It is thought that the matter that goes into a black hole gets crushed into a tiny point at the center called a “singularity”. That’s the only place that matter is, so if you were to fall into a black hole you wouldn’t hit a surface as you would with a normal star. Once it’s there, it’s there.

How do black holes distort spacetime?

In short, black holes are massive pits of gravity that bend space-time because of their incredibly dense centers, or singularities.. When a star dies, it collapses inward rapidly. As it collapses, the star explodes into a supernova—a catastrophic expulsion of its outer material.

Why do black holes distort space?

“The reason we can see that is because that black hole is warping space, bending light and twisting magnetic fields around itself.” According to Einstein’s theory of general relativity, massive objects warp the fabric space-time.

What happens to planets in a black hole?

If Earth got close enough, the side nearest to the black hole would begin stretching toward it. Our atmosphere would start to be vacuumed up. If Earth managed to fall into the orbit of the black hole, we’d experience tidal heating. The strong uneven gravitational pull on the Earth would continuously deform the planet.

How much Planck energy is needed to form a black hole?

If the Planck energy is confined to the volume of a cube of size 1 Planck length it will form a black hole. In fact, this is thought to be the smallest possible mass for a black hole and at these “Planck” distances, times and energies it is thought that quantum gravitational effects will be very significant.

What happens to space-time at the Planck scale?

Space-time could become a chaotic quantum foam due to the gravitational fluctuations from quantum fluctuations at that scale. Space-time could become quantized (which would cause violations of Lorentz invariance at the Planck scale. But I repeat, these are speculations – we really do not know what happens at the Planck Scale.

What is the plank mass confined to a Planck volume?

The Plank Mass confined to a Planck Volume will be a black hole and because gravity is so weak it takes a large amount of mass for the gravity to be strong enough to form a black hole in that volume.

How do you calculate entropy of a black hole?

When calculating the entropy of a black hole, Hawking and Bekenstein found that it was equal to the number of Planck areas (Planck lengths squared) that can fit in the cross-sectional area of a Schwartzschild black hole (or a quarter of its total surface area), in units of the Boltzmann constant.