Laws describing the interaction of black holes and their surroundings.
- The first law of Maximally gravitationally collapsed object predicted to exist by the theory of general relativity, from which no material object, light or signal of any kind can escape. Many black holes form when a high mass supergiant star explodes in a supernova explosion at the end of its life. A star probably dynamics states that the conservation laws of mass-energy, electric charge, linear momentum, and angular momentum, hold for interactions between black holes and normal matter. This is analogous to the first law of thermodynamics.
- The second law of black hole dynamics states that the sum of the surface areas of all black holes involved can never decrease during black-hole interactions, or interactions between black holes and normal matter. This is analogous to the second law of thermodynamics, with the surface areas of the black holes being a measure of the Thermodynamic quantity which is a measure of the degree of disorder within any system. The lower the degree of order, the higher the entropy; for an increase in entropy, DS is positive. Entropy has the units of J/K per mole. of the Definable part of the universe that can be open, closed, or isolated. An open system exchanges both matter and energy with its surroundings. A closed system can only exchange energy with its surroundings; it has walls through which heat can pass. An isolated system cannot exchange energy or matter with.
Some or all content above used with permission from J. H. Wittke.