what happen if two black holes of equal masses will colaspe
Answers
They can’t have the same mass. So ignoring that:
It depends on their masses, and hence sizes, and on the direction of the collision.
A neutron star is typically 1.5–3 solar masses, with a radius of 10 km. More massive neutron stars are more compressed, and hence smaller, than lower mass neutron stars.
A black hole can have any mass from about 3 solar masses to billions. The Schwarzschild radius of a black hole is proportional to the mass, so that a 3 solar mass black hole has a radius of 9 km, a bit smaller than a neutron star.
There cannot be slow collisions, due to the gravity of both objects. Either they fall together, accelerating rapidly the whole time, or they orbit each other, speeding up much more slowly.
In an off-center collision, the part of the neutron star that comes inside the event horizon of course falls all the way in. The material that initially passes outside the event horizon is pulled apart by tidal forces. The neutron star material outside the event horizon is then under greatly reduced pressure, and explodes.
That could be opposite sides of the neutron star, or in a direct hit where the entire event horizon passes through the neutron star, the center of the star and a ring.
With a larger black hole, it is possible for a neutron star to fall in completely, leaving nothing behind.
The other case is not actually a matter of slower collisions, but of a slower approach. We begin with a neutron star and a black hole orbiting each other, and losing energy in the form of gravitational radiation. Their orbits shrink, they speed up to a significant fraction of the speed of light, and eventually they merge. Again, the neutron star is shredded by tidal forces during the approach and explodes. Much of the material from the exploding neutron star is then moving too fast to fall into the black hole. Some enters an accretion disk around the black hole, and some falls right in.........
.........TYSM...........@kundan