How can something escape a black hole during an event horizon?

Since general relativity states that nothing can travel faster than the speed of light, nothing inside the event horizon can ever cross the boundary and escape beyond it, including light. Thus, nothing that enters a black hole can get out or can be observed from outside the event horizon.

Can you time travel through a black hole?

As for backward time travel, it is possible to find solutions in general relativity that allow for it, such as a rotating black hole. Traveling to an arbitrary point in spacetime has very limited support in theoretical physics, and is usually connected only with quantum mechanics or wormholes.

Why does time stop at a black hole?

Near a black hole, the slowing of time is extreme. From the viewpoint of an observer outside the black hole, time stops. Inside the black hole, the flow of time itself draws falling objects into the center of the black hole. No force in the universe can stop this fall, any more than we can stop the flow of time.

Is gravity infinite at the event horizon?

The spacetime curvature at the horizon is finite and gravity is spacetime curvature. Thus, gravity doesn’t “reach infinite intensity” at the horizon: Courtesy of Google books, here’s the relevant section from “Gravitation”: Misner, Charles W., et al.

What happens to time at the event horizon?

If you’re sitting outside the event horizon watching a clock fall in, you will never see the clock reach the event horizon. You will see the clock slow as it approaches the horizon and you’ll see it running slower and slower. However there is no sense in which time stops at the event horizon.

What happens to time as you fall into a black hole?

As you get closer to a black hole, the flow of time slows down, compared to flow of time far from the hole. (According to Einstein’s theory, any massive body, including the Earth, produces this effect. Inside the black hole, the flow of time itself draws falling objects into the center of the black hole.

What happens to time inside a black hole?

Time comes to a standstill at the event horizon, such that an outside observer will never really see anything fall inside a black hole. Strangely enough, this even includes the surface of the star that collapsed to form the black hole! If black holes draw you in, be sure to check out our FREE ebook on black holes.

What happens to Sally when she descends into a black hole?

Additionally, the light she sends back to you gradually gets dimmer and redder. According to your perspective, Sally never actually descends into the black hole; she will travel more and more slowly as she approaches the event horizon, but you will never actually see her reach “the point of no return.”

Do event horizons stop when viewed from far away?

No. A clock can fall thru the event horizon and keep on ticking (for a big BH). It is only the appearance of change at the event horizon that appears to stop when viewed from far away. The geometry of the BH tips the direction of the time axis at the event horizon so that “inward”=”future”.

How do black holes affect the speed of light?

Basically, the closer an object gets to a black hole, the more it slows down the light heading away from the black hole. It’s like pressing slo-mo replay, but it keeps getting slower and slower. The second effect is actual time dilation. Clocks actually tick slower, the closer they get to a black hole.