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10 months ago in Astrophysics , Quantum Gravity By Lukas

Do Black Holes Emit Radiation?

Contrary to the classic notion that nothing escapes a black hole, modern physics describes mechanisms for black hole radiation. This question seeks to clarify these processes, primarily Hawking radiation from quantum effects, as well as the high-energy emissions from surrounding hot accretion disks of matter.

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By Priyanka ghogge Answered 5 months ago

Yes, black holes can emit radiation through two primary mechanisms. Theoretically, all black holes are predicted to emit faint thermal Hawking radiation due to quantum fluctuations near the event horizon, though this is undetectable for astrophysical black holes. Observationally, black holes are powerful sources of high-energy radiation like X-rays and gamma rays. This emission originates not from the black hole itself but from its surrounding accretion disk, where infalling matter is heated to extreme temperatures by friction and gravitational forces before crossing the event horizon.

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