Alternate Definitions for Event horizons

The surface surrounding a black hole with the property that any light ray emitted inside it cannot escape to the outer space because of the strength of the gravitational field. The radius of the event horizon is called the Schwarzschild radius.

The surface surrounding a black hole with the property that any light ray emitted inside it cannot escape to the outer space because of the strength of the gravitational field. The radius of the event horizon is called the Schwarzschild radius.

The surface surrounding a black hole with the property that any light ray emitted inside it cannot escape to the outer space because of the strength of the gravitational field. The radius of the event horizon is called the Schwarzschild radius.