What is the boundary surrounding a Black Hole from which nothing can escape?
Answer
Event horizon
A Black Hole forms when the collapsing core of a star is so massive that no known force can halt its gravitational contraction, leading to infinite density at the singularity. Before reaching this point, the gravitational pull becomes so overwhelmingly intense that it severely warps the surrounding spacetime. The boundary demarcating the region from which escape is impossible, even for light travelling at the maximum speed, is defined as the event horizon. Crossing this boundary signifies a point of no return; anything that passes this threshold is inescapably drawn toward the central singularity, making the event horizon the defining observable feature of a black hole.
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