1. Education
Send to a Friend via Email

Discuss in my forum

Event horizon


Event horizon

Artistic rendering of a Black Hole

Definition: The event horizon is a boundary in general relativity beyond which events can't spread to affect outside observers. The most common case in physics where an event horizon comes up is in the context of a black hole, where it represents the point beyond which nothing - not even light - can escape from a black hole, due to the intense bending of the gravitational field.

©2014 About.com. All rights reserved.