Mart Posted January 27, 2005 Share Posted January 27, 2005 I'd argue that the main problem of QM is its incompatability with GR. Would you? What IYHO is the chief feature of this incompatibility? Link to comment Share on other sites More sharing options...
JaKiri Posted January 27, 2005 Share Posted January 27, 2005 Would you? What IYHO is the chief[/i'] feature of this incompatibility? The quantum foam. Or fuzz. Or whatever term you wish to use. Link to comment Share on other sites More sharing options...
Zeo Posted January 27, 2005 Share Posted January 27, 2005 I understand that the things going on here are way out of my league, but I would like to point out that Photons actually do have mass, although it's so small it's comparable to an electron, which is proportionally 1/2000 to a proton or neutron. Link to comment Share on other sites More sharing options...
JaKiri Posted January 27, 2005 Share Posted January 27, 2005 I understand that the things going on here are way out of my league, but I would like to point out that Photons actually do have mass We're talking about rest (or invariant) mass here using shorthand. Link to comment Share on other sites More sharing options...
Mart Posted January 27, 2005 Share Posted January 27, 2005 The quantum foam. Or fuzz. Or whatever term you wish to use. Would that mean the assumed inherent randomness in the quantum description? Link to comment Share on other sites More sharing options...
JaKiri Posted January 27, 2005 Share Posted January 27, 2005 Would that mean the assumed[/i'] inherent randomness in the quantum description? No, that would be the empirically evidenced inherent randomness. Link to comment Share on other sites More sharing options...
Eskay Posted January 28, 2005 Author Share Posted January 28, 2005 So, when a Photon is in motion does it emit more intense light? Link to comment Share on other sites More sharing options...
JaKiri Posted January 28, 2005 Share Posted January 28, 2005 So, when a Photon is in motion does it emit more intense light? I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question. Link to comment Share on other sites More sharing options...
Severian Posted January 28, 2005 Share Posted January 28, 2005 Light is massless because it is the gauge boson of a local U(1) symmetry. In other words, the universe has a symmetry, called the electro-magnetic gauge symmetry, which ensures that the photon is massless. Link to comment Share on other sites More sharing options...
Newtonian Posted January 28, 2005 Share Posted January 28, 2005 I'd argue that the main problem of QM is its incompatability with GR. Rather the problems with QM are incompatible with Einsteins predictable universe. Link to comment Share on other sites More sharing options...
Mart Posted January 28, 2005 Share Posted January 28, 2005 Rather the problems with QM are incompatible with Einsteins predictable universe. It makes me wonder what assumptions Einstein used in developing his relativity theory that made for this incompatibility. Historians of Science say Newton developed his theories using all manner of weird ideas. Einstein didn't believe that god was a gambler but what did that allow him to leave out of or put into his theory. Where is that weak link (if there is one) hiding? Link to comment Share on other sites More sharing options...
[Tycho?] Posted January 28, 2005 Share Posted January 28, 2005 So, when a Photon is in motion does it emit more intense light? Good god. Ok. A photon is light. Light is made up of photons. Light (or x-rays, radio waves, microwaves, heat, etc) is comprised of discreete packets of energy. We call these packets photons. So a photon does not emit light. It IS light. This also means that any photon always moves at the same speed in vacum- the speed of light coincidently, which is 300 000 kilometers per second. Review: Light is made up of photons. Photons ARE light, so it can't emit light Photons are always in motion, always moving at the speed of light ( which is the constant "c" in physics) http://en.wikipedia.org/wiki/Photon And dont read this post and ask another question without reading this link I give you. If you do I will flip. Link to comment Share on other sites More sharing options...
Eskay Posted January 31, 2005 Author Share Posted January 31, 2005 ']And dont read this post and ask another question without reading this link I give you. If you do I will flip. Okay, thanks. I understand it now, I must have mis-heard my teacher or something- I got the idea that photons emitted light and found it confusing as you could tell. ;p Link to comment Share on other sites More sharing options...
bh_doc Posted February 1, 2005 Share Posted February 1, 2005 can anyone explain how a photon can have momentum when it doesnt have any mass. or is in this case momentum completely difference from the momentum we define in classical mechanics. AFAIK, that's pretty much the case. (The more knowledgable here can correct me.) Classical momentum and relativistic momentum are two different, but related, beasts. Link to comment Share on other sites More sharing options...
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