what is the smallest possible size of a black hole?
phyzguy said:A black hole the mass of the sun is about 3 km in radius (Schwarzschild radius or radius of the event horizon), and the radius is directly proportional to the mass. If you can compress matter to a high enough density you can theoretically make a black hole arbitrarily small, but practically there is no known way to create black holes except in the collapse of massive stars. The smallest black hole that we know of is about 5 solar masses, so about 15 km in radius. There is a hypothesis that smaller black holes could have been created during the very early phase of the big bang, but these have never been seen.
CallumBoson said:One question. Is it true that the larger stars with more mass will become smaller black holes as they will collapse further under their own pressure? Or does it not work like that? I don't know much about physics so excuse any questions that might be stupid haha
phyzguy said:No. The Schwarzschild radius of a black hole is directly proportional to the mass, so the larger the mass, the larger the black hole.
jayaramas said:will the 15 km black hole also have 'event horizon'?
The smallest possible size of a black hole is known as the Planck scale, which is approximately 1.6 x 10^-35 meters.
The size of a black hole is determined by its event horizon, which is the point of no return where the gravitational pull is so strong that not even light can escape.
No, according to current theories, the Planck scale is the smallest possible size that a black hole can have. Anything smaller would violate fundamental laws of physics.
No, the size of a black hole can vary depending on its mass. The more massive a black hole is, the larger its event horizon will be.
While black holes can grow in size by consuming matter, they cannot shrink in size. This is because the event horizon can only expand and never contract.