What cosmic object is fully described by the no-hair theorem with mass, charge, and angular momentum as descriptors?

What cosmic object is fully described by the no-hair theorem with mass, charge, and angular momentum as descriptors?

• A. White dwarf
• B. Neutron star
• C. Quasar
• D. Black hole

Answer: (D)

The no-hair idea says a black hole is fully described by just its mass, electric charge, and angular momentum. This means all other details about the matter that formed the black hole are hidden behind the event horizon and don’t affect the outside gravitational and electromagnetic field. Among the given objects, only a black hole fits this description. White dwarfs and neutron stars have surfaces and complex internal structures governed by the physics of dense matter, so their exterior isn’t fixed by just a few parameters. A quasar is an active galactic nucleus powered by accretion onto a supermassive black hole; it’s the glowing environment around the hole, not the hole itself, so its properties depend on the accretion disk, jets, and surroundings, not solely on mass, charge, and spin.

The no-hair idea says a black hole is fully described by just its mass, electric charge, and angular momentum. This means all other details about the matter that formed the black hole are hidden behind the event horizon and don’t affect the outside gravitational and electromagnetic field. Among the given objects, only a black hole fits this description. White dwarfs and neutron stars have surfaces and complex internal structures governed by the physics of dense matter, so their exterior isn’t fixed by just a few parameters. A quasar is an active galactic nucleus powered by accretion onto a supermassive black hole; it’s the glowing environment around the hole, not the hole itself, so its properties depend on the accretion disk, jets, and surroundings, not solely on mass, charge, and spin.