What Is Relativity? Quotes

“The event horizon is the point at which the speed required to leave the vicinity of the black hole (the escape velocity) is the speed of light, and because Einstein’s theory tells us that no material object can reach that speed, nothing can escape from within the event horizon.”
― Jeffrey O. Bennett, What Is Relativity?: An Intuitive Introduction to Einstein's Ideas, and Why They Matter

“In principle, time would come to a halt for an object moving at the speed of light.”
― Jeffrey O. Bennett, What Is Relativity?: An Intuitive Introduction to Einstein's Ideas, and Why They Matter