Do 'dumbholes' on Earth hold the key to a black hole's interior?
By now, just about everyone knows about black holes: the all-consuming regions in outer space that are so dense that not even light can escape from their mysterious interior. But those are only one kind of black hole, even if they are the most famous of the bunch.
But, if a pair of virtual particles spawn along the edge of an event horizon, one of the two particles will get sucked into the black hole, while the remaining particle survives and flies away into space as a form of energy known as Hawking radiation. It might be slight, all things considered, but if a black hole doesn't accrete any additional material to itself, all of those infinitesimally small energy deductions will start reducing the black hole's mass. Given enough time, the black hole actually evaporates out of existence.
In order to climb out of that well, you need to reach a certain speed, known as escape velocity. So, in order to escape the gravity well of Earth, you need to travel about 6.95 miles per second , or a little over 25,020 mph . Anything less, and you'll fall back down to Earth eventually. All an object would need is an escape velocity infinitesimally greater than 761 miles per hour and it could prevent sound from escaping its event horizon, just as sure as its space-dwelling counterparts trap light.Since sonic black holes and light black holes both have this basic property around their escape velocities, there is a lot of interest around whether we can use sonic black holes to effectively model the light-consuming black holes we find in space.
What's more, even though a sonic black hole behaves the same way in one regard, the creation of an event horizon that produces a form of Hawking radiation, it might be too reductive to say that sharing a surface-level characteristic makes the two identical on more fundamental levels. A collection of 8,000 rubidium atoms in a BEC is not the same thing as a spacetime singularity of infinite density where physics as we know it breaks down. An analogy is just an analogy, after all.
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