This post specifically pertains to Blackhole energy extraction(Penrose
superradiance).
As known, Black Holes are something which gulps almost everything(except
hypothetical space-like objects). This means Black holes comprise a lot of
energy in different forms. But, is any of that energy useful?. Fortunately, a
long time ago scientists hypothesised two methods(one by Misner in 1968 and
other by Penrose in 1971) which are theoretically possible to extract energy
from a black hole.
To start with, it is important to know what a black hole comprises.
