Einstein's Cat said:Hawkings showed that black holes dissipate energy when virtual particles are "emitted" by black holes and therefore black holes evaporate.
Einstein's Cat said:However it seems to me that a shrinking black hole means a decrease in entropy
Einstein's Cat said:nd thus a violation of the second law of thermodynamics
A black hole is a region in space where the gravitational pull is so strong that nothing, including light, can escape from it. It is formed when a massive star collapses in on itself, creating a singularity at its center.
Black holes have a temperature due to Hawking radiation, which is a form of radiation that is emitted by the black hole's event horizon. This radiation is caused by virtual particles near the event horizon, with one particle being pulled into the black hole while the other escapes as radiation, resulting in a net loss of energy and a decrease in the mass of the black hole.
The temperature of a black hole is inversely proportional to its size. This means that smaller black holes have a higher temperature, while larger black holes have a lower temperature.
According to Hawking's theory, black holes will slowly lose mass over time due to Hawking radiation. However, it would take an extremely long time for a black hole to completely evaporate, and it is currently not possible to observe this process as it would take billions of years.
Entropy is a measure of disorder, and it is closely related to the amount of information that can be contained within a system. In the case of black holes, the event horizon acts as a boundary that can only increase in size, meaning that the entropy of a black hole can only increase over time. This is known as the second law of black hole thermodynamics.