>In 1974, Hawking calculated that around the event horizon - the sphere of no return surrounding a black hole - quantum fluctuations create pairs of particles. Aaron Shaw liked CYOCrawler: Open-source quadrupedal robot.Click to expand.If Hawking was correct, you and the Hotel California would eventually turn into random radiation containing no information:.Aaron Shaw liked Flea-Scope™ USB O-scope (18 Msps, $13 BoM, WebUSB).thumbedmonkey liked Outdoor Raspberry Pi Laptop / PiBook / Pi Reader.Yann Guidon / YGDES has updated the log for YGREC8.100dollarhacker has updated the log for AFM - from ground up.martin.z has updated the project titled Mini Selective solder machine.Chris Maple on Rock Salt May Lead The Way To Better Batteries.256byteram on Using 5V Programmable Logic Here In The 2020s.The Commenter Formerly Known As Ren on We’d Sure Like To Strum The Chrumm Keyboard.Peter Zieba on Using 5V Programmable Logic Here In The 2020s.crispernaki on We’d Sure Like To Strum The Chrumm Keyboard.
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on Neat Soldering Station Design Has Workshop & Portable Versions OG on Audacity Runs Surprisingly Well In Your Browser.Bestbioblogs on ATtiny85 Automates Your Smartphone.Matt Rozema on We’d Sure Like To Strum The Chrumm Keyboard.In this sense you’re essentially using it as a “matter-energy converter”, although how efficient would depend on quantum mechanics stuff we don’t know (what information actually gets preserved).ĭisplays We Love Hacking: The HD44780 Family 24 Comments If you *could* somehow create a black hole and sustain it, it’s obviously much better to just keep feeding it to stabilize it and use it as a an extremely efficient heat source. Which is obviously fairly pointless, except as a weird battery. In the case of a black hole, it means the black hole’s going away: or, you’re just recouping the energy used to form the black hole in the first place. Ultimately, the energy’s coming from the accelerated observer. That radiation itself isn’t useful, because “harnessing” it actually means you’re *slowing yourself down*. All the “information paradox” discussion between Thorne and Hawking was because no one actually knew, at a quantum level, what was going on. It’s really just coming from the Unruh effect: the “vacuum” at the black hole horizon must be excited relative to the universe at large just due to the curvature.
The “pair creation with one falling into a black hole” bit is a bit of handwavy nonsense to sound sciency. Hawking radiation is just an effect caused by the fact that an accelerated observer sees fields excited relative to an observer at rest (the Unruh effect), and near a black hole’s event horizon *everything’s* accelerated. It’s not the Hawking radiation that’s interesting – it’s the black hole itself. Posted in News, Science Tagged acoustic, black hole, gravity, hawking radiation, laser, phonon, photon, quantum physics Post navigation The experiments do require temperatures near absolute zero and a couple of powerful lasers, so it’s not exactly easy stuff still, we can’t help but wonder if sonic black holes are within the reach of the DIY community. It turns out to be far simpler than that, in fact, built his black hole machine singlehandedly from relatively simple equipment. When we first stumbled upon this story, we assumed a lab-grown black hole, even an acoustic analog, would take a CERN’s-worth of equipment to create. Except, of course, for the sonic equivalent of Hawking radiation, which the researchers found after 97,000 attempts. The point in the stream where its speed straddles the local speed of sound is the equivalent to a real black hole’s event horizon phonons inside that boundary can never escape. In these experiments, phonons, packets of mechanical vibrations that stand in for photons, are trapped in a fast-moving stream of fluid.
That’s where ’s sonic black holes come in. The predicted radiation would be orders of magnitude weaker than the background radiation, though, making it all but impossible to detect. Hawking radiation is the theoretical exception to the rule that nothing makes it out of a black hole and would imply that black holes evaporate over time. Instead, physicist and colleagues at the Technion-Israel Institute of Technology have developed an acoustic model of black holes, which is what was used to observe the equivalent of Hawking radiation for the first time. The article above was eventually edited to better reflect the truth that, alas, we have not yet found a way to create objects so massive that even light cannot escape them. It sure got our attention, at least.Īs it turns out, the truth is both less and more than meets the eye. OK, that was a little click-baity, but then again, so was the announcement this week that a scientist had confirmed Hawking radiation with a lab-grown black hole.
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