1. PF Insights is off to a great start! Fresh and interesting articles on all things science and math. Here: PF Insights

Energy to matter converter

  1. Is there any theories on taking light, and changing it to matter? Imagine a machine that could do that. Imagine instantly having a house built in front of you, in a matter of milliseconds, it's got to be the ultimate invention.
     
  2. jcsd
  3. mathman

    mathman 6,491
    Science Advisor
    Gold Member

    The lightest ordinary particle is the electron, which has a rest mass of .511 Mev. To create an electron (actually an electron-positron) requires a photon of energy greater ythan double (i.e. 1.022 Mev). Photons of this energy are gamma rays. Light photons are far too weak to turn into matter.
     
  4. LURCH

    LURCH 2,512
    Science Advisor

    If we look at the tremendous amounts of energy that are released by an atomic explosion, and the tiny amount of mass that was converted to energy to create that explosion, we can assume that the amount of energy required to make a house would be very difficult to produce.
     
  5. Even if sufficient energy could be assembled to make a reasonable quantity of matter, using these particles to make atoms, molecules, and anything recognizable as a solid is far from being feasable.
     
  6. Nice idea... Goodluck...
     
  7. what atoms are like?

    could some one tell me if atoms are actual peices of matter or not. I mean,if they are matter then that would mean that atoms would be made out of even smaller atoms and there would be an endless chain of atoms beinging made out of atoms even though that is not possible because I read some ones theorie saying that atoms can "blink themselves into and out of existence" and all infinite amount of atoms cant possibly dissapear and reappear just like that. If they are not made from smaller atoms then what are they? they couldn't be matter because they are not made out of atoms.
    It's all very confussing cn some one please answer? :bugeye:
     
  8. The "information Paradox' which is currently being debated, deals with your question in a different format, for instance back in april Orion1 asked a simple question:https://www.physicsforums.com/showthread.php?t=20803

    if you folow the thread through to its conclusion you will see that he/she makes a real-time resolution to the Hawking Radiation Paradox. It seems inconceivable that no-one else seen the significance of his Equations, but the following months produced a frantic amount of scientific activity revolving around this 'information paradox', culminating in Hawkings appearence in Eire giving his (Hawkings) solution to the said problem.

    It does prompt one to ask who is who on these forums, and what are their motovations for certain types of Questions?
     
  9. In an atomic bomb, no mass is destroyed. It is the nuclear force that causes the explosion to be so violent. When a slow moving neutron is aimed at a uranium atom, the atom braks in half,emiiting 3 neutrons in the process and a chain reaction begins. The reson for the violence and unstibility is because the uranium aton has a lot of protons in the nucleus, and they ate all positively charged. What keeps them togeter is the nuclear force, and this force is overcome with that single neutron.

    In a fusion reaction, like on the sun, the reaction mechanism is:
    [tex] 4p^+ -----> He + 2e^+ + 2V_e [/tex]

    [tex] V_e = electron\ neutrino [/tex]
     
  10. atoms

    I wonder, If an atom can pop itself out of exsistence then how can it pop itself into exsistance?
     
  11. Note: That is the rest energy. The rest mass is 0.511 MeV/c2.
    The conversion of mass-energy is not a change in mass but a change in the form the mass takes. E.g. from rest mass and kinetic energy to electromagnetic energy etc.
    Yep. Mass is conserved in such a case. Bravo. Most people miss this point.

    Pete
     
  12. LURCH

    LURCH 2,512
    Science Advisor

    Of course not, it is converted to energy (from matter). The original post was about reversing the process, converting energy back into matter. My point is that the amount of energy produced in an A-bomb ( like the Heroshima Bomb) is the result of the conversion of the original material form matter to energy of equall mass. The amount of that mass that is actually converted to energy is vary small. In the "Little Boy" device, I think they used about one pound of U-235. About 1.5% of that actually split, and that 1.5% lost a tiny fraction of its mass (which was converted to energy of equall mass). The energy of that blast is the amount of energy one would need to trap and convert into matter in order to produce a grain of U-235 with a mass equal to the amount of mass lost by the reaction.

    That energy would not need to be converted to U-235, of course; it could be made into whatever matter we desired, but the amount of energy (14.5 Kilotons) would produce only a tiny speck of whatever matter we produce.
     
  13. If there was like... an anti-entropy machine, natural or man-made (though man came from nature...). You light a match, and blow it out. Its pretty hard to put all the smoke back in, un-burn the match, put back all the particles that were blown out... yeah.
     
  14. If this is to be anywhere near practical, we would likely first need to tap into the ZPE, or some other (yet undiscovered) high density energy source, which does not rely on matter to energy conversion. Then we'll need to learn to extract that energy quickly and efficiently, such that we could produce large (read huge) energy quantities within reasonable time. We would also need to learn to build system which could handle such energy fluxes. After that, we'll need to find a way to use that energy to efficiently produce any atom we need. Chances are that by the time we learn to do all that, nanotechnology will be quite well established, so it could take over at that stage to arange the produced atoms as desired.

    All of this involves at least some new physics (except nanotechnology, for which the physics exists today), and most of it invloves a lot of new physics. We may learn those things eventually, but probably not any time soon.

    We may partially ponder the atom production stage today, but (I think) only to a limited degree.
    That is not necessary, unless you want to convert matter to energy and then back to matter, and get all your original matter back the way it was. If you allow for some mass to be lost, you can do this without any "anti-entropy" machine. But that would be rather pointless. Converting ZPE or a similar type of energy into matter (i.e. skipping the matter to energy stage) would be far more usefull. And you will in fact get plenty of by-products, but there's not much we can do about that.
     
  15. what mass is destroyed in an atomic bomb? I think you guyes have to read about the mechanism of the bomb itself befoure saying something like this. I told you above, the atomic bomb gets its energy from splitting bonds, not from destroying mass. And remember, an atomin bomb is very different than a hydrogen bomb.
     
  16. LURCH

    LURCH 2,512
    Science Advisor

    None. As has been stated, Mass is not destroyed, it is converted to energy. The product of the reaction has slightly less mass than the material that reacted. That "missing" mass is the energy of the explosion. The mass of the energy released is equal to the mass that was lost from the reaction material. It is true that this mass is taken from binding energy, but the fact remains that the atoms that are produced in an atomic reaction have less mass than the atoms that went into that reaction.

    If you think that mass is not converted to energy in an atomic bomb, then your view of the mechanism of the bomb is, at the very least, at varience with mainstream science.
     
    Last edited: Aug 13, 2004
  17. selfAdjoint

    selfAdjoint 8,147
    Staff Emeritus
    Gold Member

    A large part of the mass of an atom is in the binding energy of the pion reactions that hold it together, just as most of the mass of the protons and neutrons is in the binding energy of the gluons that hold them together. This is measured as mass, i.e. resistance to acceleration. It also gravitates when a sufficient number of atoms are present.
     
  18. chroot

    chroot 10,427
    Staff Emeritus
    Science Advisor
    Gold Member

    Please refrain from posting unsupported or non-mainstream theories to the general physics forums.

    - Warren
     
  19. chroot

    chroot 10,427
    Staff Emeritus
    Science Advisor
    Gold Member

    The energy stored in bonds contributes to the mass of the bound object. In other words, two oxygen atoms have slightly more mass when separated than when bound together, for example.

    For chemical bonds, the mass changes are quite small and are negligible. For nuclear reactions (both fission and fusion), the mass changes are substantial. Total mass-energy is conserved, but mass by itself is not.

    - Warren
     
  20. I was unaware that ZPE is not mainstream physics... :confused: If the problem is in the suggestion of tapping into it in the future, would you approve if the words "if possible" were added (they were implied)?

    EDIT: The reason I ask is that I don't quite understand where your objection comes from. I suspect it comes from you missunderstanding my claims in that post. I would like to clarify, but unforetunately I cannot do so until you clarify your objection.
     
    Last edited: Aug 14, 2004
  21. so a bond or an intermolecular interaction has mass. Doesn't that mean that something like gravity has mass?
     
Know someone interested in this topic? Share a link to this question via email, Google+, Twitter, or Facebook

Have something to add?
Similar discussions for: Energy to matter converter
Loading...