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Chapter 22: Problem 30

. What is the no-hair theorem?

Short Answer

Expert verified
The no-hair theorem states that all properties of a black hole can be completely described by just three values: their mass, electric charge, and angular momentum. Essentially, black holes have 'no hair', meaning no other distinguishing features.

Step by step solution

01

Understanding General Relativity

General relativity is a theory of gravitation that was developed by Albert Einstein in the years 1907–1915. The basic idea is that instead of being an invisible force that acts between two objects, gravity is a curvature of space and time caused by mass and energy.
02

Understanding Black Holes

A black hole, as defined by general relativity, is a region of spacetime where gravity is so strong that nothing, including particles or light, can escape from inside it.
03

The No-hair Theorem

The no-hair theorem states that all black hole solutions of the Einstein-Maxwell equations of gravitation and electromagnetism in general relativity can be completely characterized by only three externally observable classical parameters: mass, electric charge, and angular momentum. All other information about the matter which collapsed to form a black hole is lost, and thus black holes are 'bald' or have 'no hair'.

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