some information about black holes.

1.	some information about black holes.
Answer» <p>Ablack holeis a region ofspacetimeexhibiting such stronggravitationaleffects that nothing—not evenparticlesandelectromagnetic radiationsuch aslight—can escape from inside it.The theory ofgeneral relativitypredicts that a sufficiently compactmasscan deformspacetimeto form a black hole.The boundary of the region from which no escape is possible is called theevent horizon. Although the event horizon has an enormous effect on the fate and circumstances of an object crossing it, no locally detectable features appear to be observed.In many ways a black hole acts like an idealblack body, as it reflects no light.Moreover,quantum field theory in curved spacetimepredicts that event horizons emitHawking radiation, withthe same spectrumas a black body of a temperature inversely proportional to its mass. This temperature is on the order of billionths of a kelvin forblack holes of stellar mass, making it essentially impossible to observe.</p>

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