Also, if you read the "Will you see the universe end?" section in that answer, you'll see that if Cooper were watching the outside universe as he approached the horizon, he would not see an infinite number of years pass on outside clocks as he approached the horizon, and he'd still see everyone outside aging at a finite rate after crossing the (outer) event horizon (a rotating black hole is predicted in relativity to have a second inner Cauchy horizon where an observer falling through would see the entire history of the universe before crossing it, but as described in The Science of Interstellar, Cooper was rescued by the Tesseract before reaching this horizon).īut even if they could still see the image of Cooper very close to the horizon, I don't think there would be anything paradoxical about them also seeing a Cooper who had escaped from the black hole. In practice, because light is emitted in discrete photons, and because radio waves of very large wavelengths are too difficult to detect, an outside observer will cease to see any light from an infalling observer after they've gotten close enough to the horizon, as explained in the "Won't it take forever for you to fall in?" section in this answer from the Usenet Physics FAQ. It's true that in principle if a falling observer was emitting light in a completely continuous way as in classical electromagnetism (rather than in discrete photons as in quantum electrodynamics), and outside observers could detect light waves that had been redshifted to arbitrarily large wavelengths (even larger than the diameter of the observable universe, say), then an outside observer could still see the image of a falling observer suspended above the horizon forever. Brand, she would have started new colonies on Edmund's planet and the new colonized humans would have evolved to 5d beings, whereas, Cooper is still falling. So how did Cooper manage to save people on earth whereas, for the people on earth, Cooper never crossed the event horizon, and never will. In that time, the humans on earth would have been extinct. By that I mean, Cooper will keep falling and slowing down as he approaches the horizon but he will never cross it. It would take an infinite amount of time for Cooper to reach the event horizon if seen from the perspective of Dr. So here is my question and I hope someone can give me a valid explanation.Īs the theory regarding black holes suggests, for an outside observer, nothing can cross the event horizon of a black hole. And if they are in their active quasar phase, you’ll be blasted by high-energy radiation.Well, this question is missed by most or all of the people who have seen the film, but it’s been bugging me since I watched Interstellar for the first time. If you get too close, the enormous gravity will suck you in. Massive black holes are dangerous in two ways. These black holes are dark most of the time, but when their gravity pulls in nearby stars and gas, they flare into intense activity and pump out a huge amount of radiation. The remaining central ball is extremely dense, and if it's especially dense, you get a black hole.It expands and contracts until one final collapse, causing part of the star to collapse inward thanks to gravity, and the rest of the star to explode outwards.When this happens, gravity pulls the centre of the star inwards quickly, and collapses into a tiny ball.This happens when stars run out of fuel – like hydrogen – to burn, causing the star to collapse.Most black holes are made when a supergiant star dies.Conventional laws of physics stop applying at this point.At the singularity, space-time curves infinitely and the gravitational pull is infinitely strong.It's a one-dimensional point that contains an incredibly large mass in an infinitely small space.The gravitational singularity is the very centre of a black hole.The event horizon varies between different black holes, depending on their mass and size.The point at which you can no longer escape from a black hole's gravitational pull is called the event horizon.Otherwise literally everything in the universe would have been sucked into one.There has to be a point at which you're so close to a black hole you can't escape.They get their name because even light can't escape once it's been sucked in – which is why a black hole is completely dark.That's because they have extremely strong gravitational effects, which means once something goes into a black hole, it can't come back out.A black hole is a region of space where absolutely nothing can escape.
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