Question

what is the hawkins rediation? about black hole?

Answer 1

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Hawking showed that quantum effects allow black holes to emit exact blackbody radiation. The electromagneticradiation is produced as if emitted by ablack body with a temperature inversely proportional to the mass of the black hole.

Instead, they emit radiation just beyond their event horizons, the energy of their gravitational fields causing pairs of particles to pop into existence in the surrounding vacuum. Over time, generating this so-called Hawking radiation makes black holes lose mass—or even completely evaporate.