The Event Horizon Of A Black Hole Viewed Through Systemic Functional Linguistics

Hawking (1988: 85-7):

Eventually, when the star has shrunk to a certain critical radius, the gravitational field at the surface becomes so strong that the light cones are bent inward so much that light can no longer escape (Fig. 6.1). According to the theory of relativity, nothing can travel faster than light. Thus if light cannot escape, neither can anything else; everything is dragged back by the gravitational field. So one has a set of events, a region of space-time, from which it is not possible to escape to reach a distant observer. This region is what we now call a black hole. Its boundary is called the event horizon and it coincides with the paths of light rays that just fail to escape from the black hole. 

Blogger Comments:

From the perspective of Systemic Functional Linguistic Theory, according to General Relativity, the event horizon of a black hole is the distance from the gravitational singularity where the intervals of the three spatial dimensions have contracted to such an extent that the trajectory of light is curved to remain within the space between it and the singularity.