The Bekenstein-Hawking formula

The Bekenstein-Hawking formula describes the entropy, or informational content, of a black hole. It states that a black hole’s entropy is proportional to the area of its event horizon—the boundary beyond which nothing can escape—rather than its volume. This means that the amount of information hidden inside a black hole correlates with the surface area, not the size of its interior. The formula links thermodynamics, quantum theory, and gravity, suggesting black holes can be explained in terms of informational storage and hinting at a deep connection between physics laws and information theory.