Skeptophilia (skep-to-fil-i-a) (n.) - the love of logical thought, skepticism, and thinking critically. Being an exploration of the applications of skeptical thinking to the world at large, with periodic excursions into linguistics, music, politics, cryptozoology, and why people keep seeing the face of Jesus on grilled cheese sandwiches.
Showing posts with label zero-point energy. Show all posts
Showing posts with label zero-point energy. Show all posts

Thursday, November 17, 2022

A black hole's warm glow

Once again I was sent a link by my buddy Andrew Butters, of the wonderful Potato Chip Math, who is not only a great writer but has a keen eye for a cool science article.

The link was to a story in Science Alert, and was titled, "Scientists Created a Black Hole in the Lab, and Then It Started To Glow," by Michelle Starr.  But before I tell you what the gist is, I have to bring up a peevish complaint about the headline (which may not have been Starr's fault; many times the headlines aren't written by the journalist herself, so I'm not jumping to blaming her for it).  The researchers, as you will see, did not "create a black hole;" what they did was create something that models some of the behavior of a black hole.  Which is cool enough, but doesn't have the cachet that black holes have, so Science Alert apparently thought they needed to jazz things up.  The headline is wildly misleading; no massive stars were destroyed in the course of this experiment.

Of course, this is not going to stop people from reading only the headline and then posting hysterical screeds about how those Mad Scientists Are Trying To Destroy Us All and undoubtedly tying in CERN, HAARP, the Illuminati, and Reptilian Aliens From Zeta Reticuli.

You know how it goes.

Anyhow, back to reality.  What the scientists really did was pretty amazing, and may give us some inroads into figuring out one of the biggest puzzles in physics; why theoretical physicists have been unable to reconcile the equations of quantum mechanics and those of relativity.  When they attempt to accommodate gravitational effects on the scale of the very small, the equations "blow up" -- they result in infinities -- usually a sign that something is very wrong about our understanding.

The reason black holes play into this question is that in the extraordinary gravitational field at the event horizon (the "point of no return," where the space is so strongly curved that even light can't escape), there is a quantum effect that becomes important on the macroscopic scale.  It's called Hawking radiation, after Stephen Hawking (who first proposed it), and deserves some closer attention.

 To start with, empty space isn't empty.  There is an inherent energy in space called zero-point energy or vacuum energy, and it is possible for this energy to be "borrowed" to produce particle-antiparticle pairs (such as an electron and a positron).  There's a catch, though; the pairs always recollide (in a minuscule amount of time, the upper limit of which is determined by the uncertainty principle).  So the pairs pop into existence and right out again, creating continuous tiny, extremely short-lived ripples in the fabric of space.  Not enough for anyone even to notice.

Well, unless you're near the event horizon of a black hole.

[Image is in the Public Domain]

The huge gravitational field at the event horizon means that vacuum energy is much higher, and pair production happens at a much greater rate.  And because of that boundary, sometimes one member of a pair falls into the event horizon, while the other one doesn't.  At that point, the survivor radiates out into space -- taking a little of the black hole's mass/energy along with it.

That's the Hawking radiation.  What it implies is that black holes don't last forever -- eventually they evaporate, finally exploding in a burst of gamma rays.

The problem has been that the Hawking radiation is impossible to study experimentally; we're (fortunately) not near any black holes, at least so far as we know, and the faint signature of the radiation would be lost in the general white noise of the universe.  But now -- and this is where we get to the current research -- a team led by Lotte Mertens of the University of Amsterdam has developed a model that simulates this behavior, and found that just like the real thing, it emits radiation exactly the way Hawking predicted (this is the "it started to glow" in the headline).

What they did was to lock together a chain of atoms that provided a path for electrons to move, and by fine-tuning the rate at which this happened, they created a simulated event horizon that caused some of the electrons' wave-like behavior to vanish completely.  The result was an increase in thermal radiation that matched the Hawking model precisely.

Why this is significant is that it could provide a way to study the quantum effects of gravity in the lab, something that has been impossible before now.  It's not like we can hop a spacecraft and fly to a black hole (which would be inadvisable anyhow).  So this fascinating experiment might be the first step toward one of the prime goals of physicists -- finding a way to unify the quantum and gravitational models.

So even if they didn't "create a black hole in the lab," the whole thing is still pretty freakin' cool.

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Monday, May 27, 2013

Wand waving and hand waving

Consider four general truths about your average human.

First, people are attracted to novelty.  Look at how often "New and Improved!" shows up on product labels -- although I've always wondered how something can be "new" and "improved" simultaneously.

Second, the idea of curing chronic pain is a pretty attractive proposition to a lot of us.  Many people deal with pain sufficient to change our lifestyles, and in some cases bad enough to trigger thoughts of suicide.  All of us know someone whose life has been plagued with chronic pain.  Because of this, tremendous amount of (legitimate) medical research goes into developing therapies to manage, treat, or mitigate pain.

Third, we have the sad fact that most folks don't have much background in real science, so anything with science-y words is going to sound impressive, even if on analysis those words don't turn out to mean much.

And fourth, it's pretty obvious that money is a powerful motivator.

Add these four things together, and you have the makings of a scam of mammoth proportions.

Meet the Amega Amwand -- a device that uses "minerals and crystals" that have been treated with an "amized fusion process" (the details of which are, of course, a proprietary secret) to treat pain.  The minerals and crystals are encased in a steel sleeve the size of a ballpoint pen.  To treat the pain, all you basically do is to wave the wand around over the painful area, and the pain miraculously goes away.

How can this possibly work, you may be asking?  They say that the wand accesses "zero-point energy" and then uses that to stimulate your body's "bioelectric fields" and it promotes healing.  Of course, we also have the disclaimer that the wand "is not intended to treat, prevent, cure, or diagnose any medical condition," which makes me wonder what exactly "Improves body’s ability to self-regulate – more harmonized bodily functions like never before!" means.

Oh, and a video interview with a guy who sells the things says it'll also make your wine taste better.  Your food, too.  Why?  Because it "oxidizes" it.  Now, in case you're curious, burning something is also oxidation.  And my general experience with burnt food is that it doesn't, in fact, make it taste better.  But maybe that's just me.  (You should definitely watch this video, which ends with an interview with a physicist that debunks the whole claim.)

I haven't told you yet how much these things cost.  The website I linked above has wands priced at $370 each -- $704 for one that has "activated rubies" in it.

Add this to the fact that the Amega brand is a multi-level marketing (pyramid) scheme -- and this explains why Sam Adams, who is identified in the video as being one of the top "generations" of the company, is allegedly making $3,600 a day from this stuff.

So, here's the central point: could this thing actually work?

The simple answer is: no.  There's no way that a magic wand filled with minerals can have any effect on your body.  It's not "shooting out energy" (as the site claims); it's not "inducing homeostasis" any more than your body's systems already were; and it's not stimulating anything in you except the placebo effect.  The whole hand-waving "explanation" given on their website basically amounts to throwing out some technical-sounding jargon and making extravagant promises, including the inadvertently humorous statement that "this Zero Point Energy Field, gives a ginormous amount of Life Giving Energy to the body and reminds it’s [sic] cells where they came from."

Oh, and by the way: the idea of "accessing the zero-point energy" is bullshit.  Zero-point energy is a real thing, defined as the lowest possible energy that a quantum mechanical system could have.  If you could "extract energy" from it, then it wouldn't be the lowest possible energy, you know?  To quote the Wikipedia article directly:
As a scientific concept, the existence of zero-point energy is not controversial although the ability to harness it is.  Over the years, there have been claims of devices capable of extracting usable zero-point energy.

In quantum theory, zero-point energy is a minimum energy below which a thermodynamic system can never go.  Thus, none of this energy can be withdrawn without altering the system to a different form in which the system has a lower zero-point energy.

Current claims to zero-point-energy-based power generation systems are in contradiction with known physics laws and have the status of pseudoscience.
So there you go, then.

I live in perpetual amazement that people fall for something like this, especially given how pricey these things are.  I mean, if I were in chronic pain, I might risk twenty bucks on something that was a little sketchy -- but $370?  $704 for the special, ruby-enhanced version?  I suppose pain could motivate people to try something out of desperation -- which makes what these hucksters are doing even more reprehensible.  Because getting rich by selling a steel sleeve full of snake oil is also, for the unethical, a strong motivator.

After all, it's no new thing that a fool and his money are soon parted -- nor that there's a sucker born every minute.