Have you tought what would it be if a black hole would suddenly appear before you? Well, I have... Weirder still, what would it take for a human to collapse into a black hole!? I won't go into detail what a black hole exactly is because I wrote quite comprehensive post about BLACK HOLES last month.
Stars many times the mass of our Sun (The Sun has a mass of 1,9891*10^30 kg), even hundreds of times, tend to end into a black hole. It's not common for people or other objects, to spontaneously collapse under their own "gravity" and form a black hole. What if? I mean, this is totally possible, no law of relativity prohibits this. What would it take for a human to create a black hole by compressing, because that what basically is one ingredient for a black hole, so much that even the atoms collapse under the pressure. Even the Strong nuclear force can not hold up under the gravity when a black hole is born.
Needless to say, for a human to collapse so much, you would need nearly infinite amount of energy and something to compress him or her to a quantum scale, because in creating a black hole the key word is density. I had some spare time late one night and I actually did the math for a person of my "mass" (95kg) to collapse into a black hole! Schwarzschild radius equation tells how much must an object with certain mass to be compressed, the radius of the event horizon where all the mass of an object must be to create a black hole.
the equation is r=2*Gm/c2 where r is Schwarzschild radius, G is gravitational constant, m is the mass of an object divided by the speed of light square. So for me the equation would look like this:
Schwarzschild radius=2*6,67428 x 10^-11 m^3 s^2 kg^-1*95kg/300 000 000m/s^2=1.409014667^-25m
I would need to be compressed to a sphere the size of an hydrogen atom and only then would my diameter for my event horizon be 1.409*10^-25 meters. Pretty cool!
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