Modern and Theoretical Physics

I've heard about it again and again in TV series, books and movies. I have a few questions: 1. Does it exist, or is it "only" theoretical? 2. What *exactly* are the implications? What does it do to the surroundings? I've heard it can "fry" living tissue without harming buildings and still objects, and leave almost no radiation.. is that true? That entire thing creeps me out. I'd love some info on the subject.. Thanks! ~moo

Could someone please move my posts from the other thread in classical mechanics to here please. And please move if in wrong forum. So anyone have anything to say about photons?

Hello. I'm an aspiring science fiction writer and the type of science I would like to write is "hard sci-fi". That is, I want to create fantastic technologies that obey the laws of physics. I'm just trying to decide if teleportation is one of those things. Let's examine the six possibilities: quantum teleportation, matter/energy conversion, extra dimensions, wormholes, hole teleportation and space warp teleportation. A. Quantum teleportation - has already been accomplished by teleporting a photon's properties, however, not the actual photon itself. For more information, check out the following website: http://www.aip.org/physnews/graphics/html/teleport.…

Is the Universe infinitely large? I've heard that it is "expanding," but I'm not sure what that means in terms of size. Mathematically, something infinite can be expanding, yes? If the Universe is not infinite, it is what? Very, very big? I'm not real clear on the basic concepts of this kind of theory, so point me to a resource if you can.

Q: How can a fridge magnet cling against gravity endlessly without draining a power source? A: It can't ... fridge magnets are impossible according to today's science. As we all know, it takes tremendous energy to cling to the side of a cliff, supporting our own weight against gravity, and before long we would tire and fall. Yet a fridge magnet is not glued to the fridge -- it is held by magnetic energy. And, as both our science and our common sense tell us, such an expenditure of energy requires that a power source be drawn upon to support this effort. Yet, a permanent magnet not only maintains its strength indefinitely (no theory or text- book shows …

I was just wondering whether there was a kind of opposite atom. Like positrons would be in the orbitals, and particles that were the same size and mass of protons, but same charge of electrons in the nucleus with normal neutrons. I know positrons exist, and you could make the electon(my made-up name for the negatively charged proton) with 3 down quarks. I was just wondering about this and it would be interesting to know.

i understand how one can produce such an effect, but is there any explanations on why these particular shapes appear and is there any significance to them besides then to release extra heat? and can the usual shape structure be altered or does it always make the exact same pattern?

Is there any research out there that would suggest the creation of a man-made quon field? Thanx, Frank

Everthing can reflect. And we can see our face when a glass in front of us. Then, is that is internal reflection only, and does not have the reflection like mirror?

I raised this Question to my Physics teacher and he thought it was OK. However I like to share it here. IMAGINE: A 5 inch sphere covered with a perfect reflecting meterial inside(if there is such a thing!). And there is a pin hole in the sphere through which light or laser is blasted with pretty high illumination. and the pin hole is closed in apropriate time so that the light remains inside. SO: 1.Will the light remain inside? 2.What will happen when we open it in a dark room? 3.Will the light fade away(it shouldnt though)? 4.Can it be used as a reservoir.

Hey people... I am wondering what makes up a magnetic field. What is this thing we cannot see, this 'force' that attracts and repels. *not 'what causes it?'... but 'what IS it?' I believe I read something fairly old that said the 'force particles' were photons of some kind?!?! Thanks

i had this idea... sure the magnets will die but other than that, is anyone willing to try to build this perpetual machine concept, or tell me why it wont work..or how to fix/improve it? http://home.comcast.net/~bmccarty/perpetualmotion82403.html

How is it possible to generate enough energy to maintain a Quantum Wormhole on a Macro scale? Background: I vaguely remember watching an edition of Horizon on UK television. It was basically Kip Thorn and Stephen Hawkins talking about the possibility of using scaled up Quantum Wormholes as a means of FTL travel, and by extension, Time Travel. The program tried to say that if such a Wormhole could be created, a person could enter it at one end, and instantly emerge at the other... queue pics of one half of intrepid explorer poking his head out of one portal while his feet and legs stuck out another portal like a 'sawing the woman in half' magic trick. All I cou…

From: http://www.geocities.com/haripaudel/Parallel_Universes.htm Max Tegmark goes on to describe level 1, 2 and 3 multiverses, and then gives his own novel idea: the level 4 multiverse. Basically, he states that the universe we are in is a particular mathematical structure, and every possible mathematical structure that can exist, does exist. That is, there are different universes with different laws of physics... and infinitely many of them. Sounds kinda cool... What do you think?

hey,im trying to make a inertia diagram, of to cars crashing and explaining loose objects. but i dont know what forces to include etc. plz help thankyou

Somebody recently told me that two electromagnetic waves in the same place ALWAYS combine to create a new wave. If this is true why don’t radio waves and other electromagnetic waves combine with light, effectively changing the color?

The smallest wavelength detected so far is 10^-11, for gamma radiation. According to my reading that is so how is this detected and why arent they trying to detect smaller wavelengths? Is there a theoritical and pratical limit to these things? BTW i didnt know which forum this should go under thats why its here, prob shoulda been in physics-theoritical

Could someone please explain to me what the string theory is? Please use simple language! I find it hard to understand what you guys say at times (but in the other hand, i learn something new).

Im aware theyre size is so neglibible, something to the order of 10 ^-32, that it would not matter even, but im curious to know. If they dont have mass, are they just a force then? Now, if strings are in everything, atoms, fermions.. does that mean they compose these particles and the only differentiating characteristic is its resonance pattern?

Hey i was wondering if anyone knew these questions. 1) Analyse the potential danger of loose objects in a vehicle. include a discussion on inertia in this analysis. 2)Discuss the addition of crumple zones and air bags to cars with respect to the concepts of impulse and momentum. If anyone could give me the formulas used to work this out it would be great Thanks Ice_phoenix87

Has anyone here read Stephen Hawking's 'The Universe in a Nutshell'? It is very well written, and explains the views and theories of past scientists with gret detail and clarity.

i have seen advertised tours to chernobyl recently. Can anyone advise me as to whether the levels of radiation there now are safe for humans?

i'm on an atomic binge at the moment. i have 2 questions. 1. in simplistic terms, how does an atom bomb work? 2. how would you describe the sheer power contained within an atom?

seriously though, for all those physics types out there, i was wondering what the nuclear analog to electron promotion is (if such a think exists). I mean, electrons can be promoted up to a new energy level (shell) by exiting them. Is there such a thing for nuclear stuff? Is it just normal vibrational modes, when you are talking about the nucleus? If so, then what about a free proton (no electrons)? Can it be exited to a higher energy state? IF so, is it just the particle in the box thing? Anyways, if anyone feels like answering this question that would be great. I was just wondering this the other day while sitting in lab. Oh, and by the way, if you kn…

hello all. (i accidentily posted this on the wrong forum) I have a question for a school project i'm working on: What would happen to the universe if the electromagnetic force in every atom weakened and no longer bound electrons to the atom? thanks josh