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wolram
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What is meant about (hair)?
The only info, according to the no-hair theorem, that we can get from a Black Hole is only about its mass, electric charge and angular momentum because all other info (which was called hair) gets lost behind the event horizon.wolram said:What is meant about (hair)?
A hairy black hole is a theoretical concept in astrophysics where a black hole is surrounded by a field or structure that extends beyond its event horizon. This field or structure is called "hair" because it changes the appearance of the black hole and affects its behavior.
Hair has a significant impact on a black hole's properties, such as its mass, spin, and gravitational pull. It can also affect the way black holes interact with matter and other objects in their vicinity.
Some proposed examples of hairy black holes include Kerr-Newman black holes, which have both electric and magnetic fields, and gravastars, which are hypothetical objects with a shell of matter surrounding a central singularity.
Scientists use computer simulations and mathematical models to study hairy black holes. They also observe the effects of these structures on their surroundings, such as the distortion of light and matter.
While there is no conclusive evidence for the existence of hairy black holes in our universe, some theories and models suggest that they may be possible. However, more research and observations are needed to confirm their existence.