[B] What is Quantum Physics? [/B]
[Quote] Quantum mechanics is a fundamental physical theory which extends and corrects classical Newtonian mechanics, especially at the atomic and subatomic levels. It takes its name from the term quantum (Latin for "how much") used in physics to describe the smallest discrete increments into which something is subdivided. The terms quantum physics and quantum theory are often used as synonyms of quantum mechanics. Some authors refer to "quantum mechanics" in the restricted sense of non-relativistic quantum mechanics. Quantum mechanics should however be taken to mean quantum theory in its most general sense when used in this article.
Quantum mechanics describes with great accuracy and precision many phenomena where classical mechanics drastically fails to agree with experiments, including the behavior of systems of very small objects typically the size of atoms or smaller, but also some macroscopic phenomena, like superconductivity and superfluidity. Quantum mechanics successfully addresses these failures, achieving unprecedented precision in its agreement with experiment. It also satisfies Niels Bohr's Correspondence principle, in that it agrees with classical mechanics for those phenomena where classical mechanics agrees with experiment. It is therefore suitable to replace the various older theories of classical mechanics as a more fundamental theory.
It is the underlying framework of many fields of physics and chemistry, including condensed matter physics, quantum chemistry, and particle physics. It is derived from a small set of basic principles, and predicts at least three types of phenomena that classical mechanics and classical electrodynamics cannot account for: discrete or quantized emission spectra of atoms, wave-particle duality, and quantum entanglement. It also explains many physical phenomena that contradict the predictions of classical mechanics, such as the existence of stable atoms and the spectrum of the electromagnetic radiation emitted by a black body, which are examples of systems where classical mechanics departs drastically from experiment.
The foundations of quantum mechanics were established during the first half of the 20th century by Max Planck, Albert Einstein, Niels Bohr, Werner Heisenberg, Erwin Schrödinger, Max Born, Paul Dirac, Richard Feynman and others. Some fundamental aspects of the theory are still actively studied.
[/Quote]
To start the discussion...is it possible for alternate universes to exist? If you measure a bug to be 3 centimeters, would it be 2 centimeters in a parallel universe?
Oh god, reading through this thread later is going to hurt my mind.
[IMG]http://www.cubeupload.com/files/5230bcfpawnch.png[/IMG]
" FP! If it's not about lasers, kittens or fapping, we don't much care! "
[QUOTE=Yahnich;25184410]If a bug were to be 3 centimeters in this universe, it would be 3 centimetres in another. Because metres are defined as an arbitrary length, this length would change too in the universe. So the scale would stay the same. [/QUOTE]
But what if the variables used to determine the size of a centimeter was also changed? And I was meaning a bug measured to our scale.
inb4 wave of facepunch quantum physicists
[QUOTE=Armyis1337;25184752]inb4 wave of facepunch quantum physicists[/QUOTE]
For being a forum generally populated by young teens I would say that some of them are actually decently knowledgeable in the field.
[QUOTE=Yahnich;25184826]Well, metres is simply a measurement, like feet, but of course it COULD be smaller. I don't see why it would be though, if you put a bug of 3cm in an alternate universe it would still be 3cm. Its composition does not change.[/QUOTE]
Why would an alternate universe contain the same bug in the first place?
I have played gmod for over 24 hours I believe i am fully qualified in this field.
Quantum physics exist only in the minds of old men, and kids who want to act smart.
At least, practically.
[QUOTE=Jawalt;25184967]Quantum physics exist only in the minds of old men, and kids who want to act smart.
At least, practically.[/QUOTE]
What..? :crossarms:
[QUOTE=Yahnich;25184826]To be honest, if you want a discussion about quantum physics, you'd be better off asking shit like time travel, considering time travel is something we can comprehend, while universes that do not obey our laws of physics or have altered laws are just complete mindfucks.[/QUOTE]
[B] IS [/B] time travel even possible?
Half of it is complete speculation, maybe more. It's not conclusive, and a bit far fetched.
[editline]07:51PM[/editline]
I'm not saying the topic has no basis, but that a lot of it is speculation, yet people discuss this shit like it's well-documented gospel.
[QUOTE=Foo King;25185000][B] IS [/B] time travel even possible?[/QUOTE]
I suggest for the sake of the thread that we skip this question.
[QUOTE=Foo King;25185000][B] IS [/B] time travel even possible?[/QUOTE]
Travelling forward in time is very much possible.
However, travelling backwards remains completely speculative.
.. Yeah, see above answer.
You travel forward in time every second. Spooky shit right?
Here's something to discuss. I'm no expert at all, but anyway:
The fundamentals of Quantum Physics state that every particle should be seen as a wave of energy. Now, where this wave is located is impossible to predict 100 %. Infact, the location of a wave is never certain. There's only a possibility that the wave is located at that very spot. For example, let's say we place a proton in a sealed box. You might say that "well, it's in the box, and it will stay there as the box is completely sealed". According to quantum physics, this doesn't have to be true. There's a very small chance that the location of the particle will be [i]outside[/i] the box. And if this is the case, it will seem as the proton has somehow magically passed through the box. It has [b]tunneled.[/b]
This is true. It is very much confirmed and accepted among physicists today. So yeah... theoretically, an atom of your body could at this moment position itself in outer space. And if you're lucky, every atom of your body could do the same thing, and what do you know, you are now in space! The possiblitiy detoriates quadratically, and since every particle's possibility is unlinked, the chance for this to happen is [I]insanely[/I] small. So in our every day world this is nothing of significance. But on very small systems at a particle level you must take this into consideration.
[QUOTE=Adius Shadow;25184823]For being a forum generally populated by young teens I would say that some of them are actually decently knowledgeable in the field.[/QUOTE]
I don't think so, to be really really [i]really[/i] honest. There are maybe 2 or 3 that knows what they are talking about. The rest doesn't know shit about it.
Quantum Physics is one of courses that you study really late in the Physics programme here in Sweden. I don't doubt that it's the same in other countries. But I doubt that 50% of the Facepunchers has taken the programme and studied that/thouse course/s.
Seeing teenagers/kids discussion it is fine, but when they begin to get all hyped of "quantum computers" and any thing that has the word "quantum" in it, it get's pretty annoying.
Now I'm quite the hypocrit so I like to think that I know :v:
How come when people talk about quantum physics they automatically talk about time travel or alternate universes? Why don't we talk about concepts relevant to science today?
[QUOTE=Jawalt;25185009]Half of it is complete speculation, maybe more. It's not conclusive, and a bit far fetched.
[editline]07:51PM[/editline]
I'm not saying the topic has no basis, but that a lot of it is speculation, yet people discuss this shit like it's well-documented gospel.[/QUOTE]
That's what separates a good theory from a bad one
A good theory has both basis in reality and [i]can predict other implications[/i] i.e. you can just speculate on what it all means
A bad one merely describes observations
not like any of the 15 year olds here would know two shits about quantum physics
[QUOTE=Foo King;25184364][B] What is Quantum Physics? [/B]
To start the discussion...is it possible for alternate universes to exist? If you measure a bug to be 3 centimeters, would it be 2 centimeters in a parallel universe?[/QUOTE]
You're in water too deep for yourself.
Quantum Physics is theoretical, so this debate won't have any concrete evidence and it won't go anywhere. Especially since none of these kids ever took Physics
I'm in a higher level physics class myself so I could do it but like I'm sure HL Physics kids are almost nonexistent here
[QUOTE=Protocol7;25185982][b]Quantum Physics is theoretical, so this debate won't have any concrete evidence[/b] and it won't go anywhere. Especially since none of these kids ever took Physics
I'm in a higher level physics class myself so I could do it but like I'm sure HL Physics kids are almost nonexistent here[/QUOTE]
bullshit
[QUOTE=Protocol7;25185982]Quantum Physics is theoretical, so this debate won't have any concrete evidence[/QUOTE]
I'm sorry, what
Concrete evidence? How about the semiconductors in the computer you're using right now to send that message through the internet?
So quantum mechanics, then, takes the certainties learned studying quantum physics and turns them into theories? Maybe the Grand Unified Theory isn't too far off.
[QUOTE=Protocol7;25185982]Quantum Physics is theoretical, so this debate won't have any concrete evidence and it won't go anywhere. [b]Especially since none of these kids ever took Physics[/b]
I'm in a higher level physics class myself [b]so I could do it[/b] but like [b]I'm sure HL Physics kids are almost nonexistent here[/b][/QUOTE]
also bullshit
[QUOTE=Foo King;25185000][B] IS [/B] time travel even possible?[/QUOTE]
Of course!
Living proof:
[img_thumb]http://farm1.static.flickr.com/183/457933992_0201e8a98b_o.jpg[/img_thumb]
Here's another mindfuck:
We humans live and act in 4 spacetime dimensions. That's 3 spacial dimensions [B]([/B]forward/back [B]|[/B] left/right [B]|[/B] up/down[B])[/B] and 1 temporal dimension [B]([/B]forward/back[B])[/B]. Now, if string theory is correct, we should expect more dimensions. Something like 10 spacial dimensions, and 3 temporal dimensions. If the fact that there are more spacial dimensions than our three normal ones is very hard to grasp, then even more mindblowing are the time dimensions. I mean... that means that you can hypothetically travel forward and back in time, but also sideways, and up and down! Travel up and down in time? Good luck imagining that.
I'm pretty sure you could understand n-dimensions by describing it as an n-1 array of n-1 dimensions. It works with 2d and 3d.
[QUOTE=Rad McCool;25186466]Here's another mindfuck:
We humans live and act in 4 spacetime dimensions. That's 3 spacial dimensions [B]([/B]forward/back [B]|[/B] left/right [B]|[/B] up/down[B])[/B] and 1 temporal dimension [B]([/B]forward/back[B])[/B]. Now, if string theory is correct, we should expect more dimensions. Something like 10 spacial dimensions, and 3 temporal dimensions. If the fact that there are more spacial dimensions than our three normal ones is very hard to grasp, then even more mindblowing are the time dimensions. I mean... that means that you can hypothetically travel forward and back in time, but also sideways, and up and down! Travel up and down in time? Good luck imagining that.[/QUOTE]
[Media] [url]http://www.youtube.com/watch?v=NNvHdCosX08[/url] [/media]
[QUOTE=Jawalt;25186871]I'm pretty sure you could understand n-dimensions by describing it as an n-1 array of n-1 dimensions. It works with 2d and 3d.[/QUOTE]
Ehh... ok?
[QUOTE=Foo King;25186932][Media] [url]http://www.youtube.com/watch?v=NNvHdCosX08[/url] [/media][/QUOTE]
That's cool, but it doesn't quite explain it I think.
Let's say we kick a ball and stop all time the moment we strike it. Now let's move 1 second i x-time. We will clearly see the ball move a certain direction. Nothing strange here. But what exactly should we expect from adding 1 second y-time and z-time? Any ideas?
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