Physics

John_Hasler , in Why You Can Hear the Temperature of Water

The viscosity of hot water is much lower.

nooneescapesthelaw , in A question for the Physics communities

Can you elaborate on the portal? What does it do, is it between two locations or is it just a hole, or is it just a black circle?

rah , in A question for the Physics communities

The scientific method doesn't rule out any phenomena, it simply provides a method of investigating phenomena.

GardenVarietyAnxiety OP ,

I should have put more emphasis on the other part: The possibility, however unlikely, that a wave function "cascade" would create (what at least appears to be) a black portal.

rah ,

a wave function "cascade"

I'm not sure what you're referring to. It sounds like you've heard some physics words, misunderstood them, and are regurgitating them based on that misunderstanding.

GardenVarietyAnxiety OP ,

I'm asking questions based on "physics words" I've heard, yeah.

I just used cascade to describe many waves collapsing to create a whole.

I'm asking if the wave functions in the particles around us could collapse in such a way that they could absorb light, or even change the composition of atoms?

rah ,

I'm asking if the wave functions in the particles around us could collapse in such a way that they could absorb light, or even change the composition of atoms?

Your question doesn't make sense.

goddard_guryon ,
@goddard_guryon@sopuli.xyz avatar

Since you're seeking for answers within physics buzzwords, you're missing a lot of nuance which is causing you to come up with nonsensical theories. For one, the wavefunction doesn't exist 'in' the particle, it is the particle. A wavefunction collapsing is what causes a particle to show up in a specific location (going by the most prominent interpretation of the wavefunction); as long as the wavefunction is non-zero at more than one location, the particle exists in all those locations.

Equipped with this knowledge, phrases like "a wavefunction collapsing in such a way that it absorbs light" or "change the composition of atoms" make no sense, so I'd suggest you to rethink your assumptions, and, if possible, not look at quantum mechanics as a magic black box that can explain everything a mind can conjure up.

blackbrook ,

You're throwing around the term 'black portal' very casually. I have no idea what it means, but it is certainly a big leap from whatever was observed to some conclusion about what it actually was. That's a big flaw if you are trying to get at the truth.

Apytele , in A question for the Physics communities

Not sure how math/logic factors into this for you but the impossibility of proving a negative seems to apply here. It's one of the basic bits of logic I teach patients (at least when they ask about reality testing, which is rare). I tell them it's pretty near impossible to prove something doesn't exist or didn't happen, and that I find the best thing is to focus on what was most likely. It's very rare I don't find a very mundane reason for pretty much everything, and the few things I can't there's pretty much nothing I can do about anyway.

GardenVarietyAnxiety OP ,

I'm not trying to prove that something doesn't exist. I'm asking if we follow the scientific method, does our current understanding of quantum physics allow for phenomena like this to potentially exist in reality?

nooneescapesthelaw ,

This is more of an "is it possible?" type of thing more than it is proving a negative.

For example is it possible for a human to grow 200 feet tall? The answer is no (im not a biologist but probably not) and then you can justify it with science

tobogganablaze , in A question for the Physics communities

The scientific method can't rule out the existance of supernatural stuff like gods or magic. And you can totally explain a black portal (or literally anything you want) with magic or the actions of a god.

GardenVarietyAnxiety OP ,

Can they be explained by quantum states being in an incredibly unlikely but not impossible state?

tobogganablaze ,

Is it really an explanation if it requires something so incredibly unlikely?

I think you will have a much better chance for finding an explanation by looking into optical illusions or hallucinations.

GardenVarietyAnxiety OP ,

Is it really an explanation if it requires something so incredibly unlikely?

Yeah, technically

rah ,
Transcendant , in Why You Can Hear the Temperature of Water

Ahhhh fascinating.

For years, I've been adamant that when I stir a cup of hot tea or coffee, the pitch of the scraping spoon almost imperceptibly shifts, and assumed it was because of the gradual slight cooling of the water. Nobody else could seem to hear what I heard.

Wasn't sure if it was my music producer ears or imagination.

lolrightythen ,

Pouring a cup of hot water for tea def sounds different

makeshiftreaper , in Why You Can Hear the Temperature of Water

Here's a Tom Scott video instead of a paywalled article

Alice ,
@Alice@hilariouschaos.com avatar

Removed

justabaldguy , in Why You Can Hear the Temperature of Water

Always wondered about this. Article is pay-walled though.

HEXN3T ,
@HEXN3T@lemmy.blahaj.zone avatar

Another commenter posted a Tom Scott/Steve Mould video with the same subject. In case you haven't seen it already.

Revan343 ,

TL;DR the difference in density at different temperatures changes the sound

akwd169 , in DIY Paul Ion (Particle) Trap [oc]

identical to the real thing

As in the ion trap used in a mass spectrometer, for example?

That's super cool! Thanks for sharing and explaining in such detail

nik282000 OP ,
@nik282000@lemmy.ca avatar

Yeah, this is very similar to what is used in some types of mass spectrometers. In my case it sorts dust by its mass/charge ratio.

umbrella , in DIY Paul Ion (Particle) Trap [oc]
@umbrella@lemmy.ml avatar

this looks very scifi

nik282000 OP ,
@nik282000@lemmy.ca avatar

That's why I built it. I though it was so weird to see something so Star Trek that is actually the basis of a scientific instrument.

deegeese , in DIY Paul Ion (Particle) Trap [oc]
@deegeese@sopuli.xyz avatar

Is this running on household 120v 60Hz or what?

nik282000 OP ,
@nik282000@lemmy.ca avatar

The voltage on the trap is around 8kV at 60Hz.

lvxferre , in Single atoms captured morphing into quantum waves in startling image
@lvxferre@mander.xyz avatar

Archive link: https://archive.is/jk2GY

This is... weird, although it does fit the theory well. And fucking cool.

sudoreboot , in Single atoms captured morphing into quantum waves in startling image
@sudoreboot@slrpnk.net avatar

tl;dr:

Peter Schauss at the University of Virginia says the wave packet is such a well-understood component of quantum theory that the findings of the new experiment are not surprising – but they do show that the researchers had a high degree of control over the processes used to cool and then precisely image the atoms.

I'm not entirely sure what they mean by having images of their waviness, because that is not how it works. You can not measure a quantum wave, because it isn't a "particle" wave but a wave-like distribution of mutually exclusive measurement outcomes. Taking a picture is the same as entangling yourself, which embeds you in the quantum wave function such that it describes all possible combinations of you ending up with every possible outcome.

fossilesque OP ,
@fossilesque@mander.xyz avatar

https://arxiv.org/abs/2404.05699 There's the paper I think.

sudoreboot ,
@sudoreboot@slrpnk.net avatar

As I understand it, they are making measurements of an otherwise single isolated particle as it moves about in a controlled space, and the measurements confirm (yet again) that the measurement outcomes match the probabilities given by the Schrödinger equation, which means that it interferes with itself.

The language used may lead some to think that we now have images showing a wave-like particle, but again, that's not something that can ever happen. What we have are boring old images of a single classical-looking particle, but the patterns they display tells us that quantum mechanics is very much at play in between the takes.

tearsintherain , in Forget billions of years: Researchers have grown diamonds in just 150 minutes
@tearsintherain@leminal.space avatar

How an Ad Campaign Invented the Diamond Engagement Ring

In the 1930s, few Americans proposed with the precious stone. Then everything changed.
https://www.theatlantic.com/international/archive/2015/02/how-an-ad-campaign-invented-the-diamond-engagement-ring/385376/

AncientFutureNow , in Forget billions of years: Researchers have grown diamonds in just 150 minutes

Finally, I can afford diamond encrusted tweezers!

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