Schwarzschild Radius

The Schwarzschild radius is a critical boundary in space around any object, representing the point where gravity becomes so strong that nothing, not even light, can escape if the object's entire mass were compressed within this radius. It's most famously known as the event horizon of a non-rotating black hole, marking the "point of no return." This concept helps us understand the extreme gravitational effects predicted by <a href="/article/albert-einstein">Albert Einstein</a>'s theory of general relativity.