Posted on 08/15/2016 8:54:32 PM PDT by brucedickinson
Steinhauer created a sonic black hole using a quantum state of supercold fluid called a Bose-Einstein condensate. The fluid flows through a tube in which lasers constrain the flow at two different energy levels, creating a kind of waterfall. Atoms reach supersonic speeds when they spill over its edge. This serves as the model event horizon.
To measure Hawking radiation, he pinged the fluid with a short laser pulse. This created a sound particle known as a phonon, along with a partner particle, near the horizon – just as Hawking suggested happens near a real black hole. He then took pictures measuring the refractive index in the fluid – a method used to image waves – to track the sound particle and its partner particle as they moved toward the event horizon. He repeated the experiment 4600 times over six days.
When he looked through the images, he noticed a dark band emanating in both directions from the event horizon, which he says is evidence that two distinct particles were propagating at the exact same time despite being separated by the horizon. This
(Excerpt) Read more at newscientist.com ...
Wow...talk about “entanglement” and being two places at once!
What’s that supposed to mean? We aren’t allowed to make scientific discoveries until Isis is destroyed?
Loved Number. POM, and Powerslave.
I will now proceed to entangle the entire area.
Sound black hole... I think I heard them in concert?
Phonons are quasiparticles, not real particles.
Say what you want, I doubt barkie was “made in the lab.”
Lock this guy up before we get sucked into an alternate universe!
Looks like we don’t have to wait for SMOD.
Bruce - thanks for posting!
Book of Souls is damned good too. I’m still enjoying the concert from 4/28.
Cheaper to rent the movies “The Black Hole” and “Event Horizon”, and less time consuming.
I hope they had insurance.
No but a 60 hz sine wave produced by an oscilloscope does correspond with a 60 hz sound wave when played through a speaker. So he was partly right. Very low wavelengths of EM radiation to correspond to their counterparts in the sound spectrum, ie. 60 hz hum heard thru speakers with an often heard higher 120 and 240 (read octave) harmonics. Electrically powered barber clippers give off the higher 240 harmonic(the loud buzz) though you can feel the lower 60 hz resonating in the clipper body...put the clippers on a speaker near the base element and you’ll often feel and hear the lower harmonic emanating from the woofer.
The reaction on campus to the article was certainly a foreshadowing of things to come. Most people thought it was cool that black holes existed and that light was drawn into them, etc. The black students' caucus expressed outrage and held a demonstration protesting the article, claiming it was "prejudiced". The imbeciles (for there is no other accurate term) thought this physics article was about black girls' private parts! And these people got into college???? Must have been the first wave of affirmative action.
Bookmark.
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