You can get half of the energy you dump in back out.
What do you mean by this exactly? Does the other half come out as particles? If so, why not just dump the particles back in until everything comes out as energy?
Good catch. I meant when you dump in mass energy into a black hole, it eventually radiates it back out and about half of that radiation is stuff we can make use of: light, electrons, positrons, protons, neutrons etc. The other half is neutrinos.
What do you mean by this exactly? Does the other half come out as particles? If so, why not just dump the particles back in until everything comes out as energy?
Good catch. I meant when you dump in mass energy into a black hole, it eventually radiates it back out and about half of that radiation is stuff we can make use of: light, electrons, positrons, protons, neutrons etc. The other half is neutrinos.