Search results

  1. J

    Android robotics, quantum physics lab

    Yes it was and still is in prototype stage, small improvements made with each step.
  2. J

    Android robotics, quantum physics lab

    Thanks Greg, I'd forgotten I posted this. I am just trying to generate interest in the project really. It could be so much much better if we had the money, so progress is not as fast as I'd like but it is moving forward which is the main thing. This lab is intended to be an interactive online...
  3. J

    The Higgs Mass and the Many worlds interpretation

    My question was about many-worlds, though as you say Bill, they are not quite the same thing, so I guess it's not relevant. Thanks
  4. J

    The Higgs Mass and the Many worlds interpretation

    I was trying to remember where I heard it. It was a documentary which was about the Higgs discovery, I think it was called Particle fever. Good movie, gives a lot of insight. It may well be that I misunderstood or misheard. I should watch it again. I do recommend it though.
  5. J

    The Higgs Mass and the Many worlds interpretation

    No I haven't heard anything seriously refuting it either, however, the multiverse interpretation in particle physics (which I was assuming is just the same thing as Many-worlds in QM) predicts a Higgs Mass of 140 GeV. The Supersymmetry interpretation predicts 115 GeV. The observed value was...
  6. J

    The Higgs Mass and the Many worlds interpretation

    I have a question about the Many worlds interpretation. Does the observed mass of the Higgs boson suggest that the many worlds interpretation is incorrect, as the mass falls smack in the middle of the predicted values of both supersymmetry and multiverse interpretations of the standard model of...
  7. Derivation of compton scattering part 2

    Derivation of compton scattering part 2

    algebra practice part 2: second part of a mathematical derivation of Compton scattering
  8. Derivation of compton scattering part 1

    Derivation of compton scattering part 1

    algebra practice part 1: first part of a mathematical derivation of Compton scattering
  9. J

    I Delayed Choice Quantum Eraser Question

    You can build a simple version of this by putting polarisation filters on the slits at 90 deg to each other. Because you now have a way of knowing which slit the photon came through you get no interference (it acts like a particle). You measure by having another polarisation filter after the...
  10. J

    Android robotics, quantum physics lab

    some cool stuff happening here
  11. J

    Constant current

    ...and so is worth pursuing. Thank you very much. your help is much appreciated. It will save me having to purchase another power supply.
  12. J

    Constant current

    I have a variable voltage constant current power supply 0-300v at 50mA. Is it possible and if so what would be the simplest way to have a parallel circuit with 0-300v 50mA on one side and 0-300v 50uA on the other? A simple resistor isn't going to work because the supply maintains 50mA. Any help...
  13. J

    Is Higgs boson surely a particle?

    With all due respect Bill_K I think that quantization means to turn a continuous entity into a discrete entity and wavefunctions are considerd to be continuous entities that evolve smoothly and deterministically in the absence of measurement. Only on measuring the field will it be discretized...
  14. J

    Is Higgs boson surely a particle?

    I don't doubt that the field/particle distinction is important but I'm pretty sure that the quantum of the Higgs field is the Higg's boson??? Am I making some mistake in thinking that a quantization is the same thing as a quantum is the same thing as an exitation?
  15. J

    Is Higgs boson surely a particle?

    It is important to understand that particles are quantizations of fields (fields are particles, particles are fields). And also that we are talking about quantum particles, which are not to be thought of as ordinary classical particles. There is some good introductory level info here about how...
  16. J

    Virtual particles inside black holes

    It is an interesting if not highly theoretical question. The best we can do (or at least the best I can do) is say that the surface area describes the internal entropy of a black hole (i.e Leonard Susskinds holographic principle and Stephen Hawkings equations for black hole entropy). The...
  17. J

    Hello my first post more of a philosophical question if anything

    And of course, keep coming back to this forum to ask questions if there is anything you dont understand in the videos. I myself have found that method very useful.
  18. J

    Hello my first post more of a philosophical question if anything

    Hi Zackness123 The idea of a universal conciousness comes from the idea that measurement (or observation) is what brings a particle into reality and therefore a universal conciousness is required to bring the universe into existence. It is a philosophical belief and there is no definitive...
  19. J

    Can someone explain to me the wave theory and quantum theory.

    This could be a good place to start http://www.youtube.com/watch?v=x5wlsIhooms&list=UU_fHG6JygMd7oIvQ5S_cSIg&index=6&feature=plcp Regards
  20. J

    The use of probability in QM

    Well, I have come back to this thread after a few days away and am amazed by the number of posts. From this very intelligent debate (which may be slightly over my head at times), I shall conclude that the statement 'we don't know' was a legitimate one to make. I came seeking an answer and have...
  21. J

    Difference between classical wave function and quantum wave function

    The classical wave equation describes the behaviour of waves, whereas the schrodinger equation describes the behaviour of a quantum particle, A good descriptioon of it can be found here http://www.youtube.com/watch?v=G3NgOHwxhMg&list=UU_fHG6JygMd7oIvQ5S_cSIg&index=6&feature=plcp
  22. J

    The use of probability in QM

    Thanks for all the replies so far, I've read them with interest. I will take it that the guy in the video therefore made a legitimate statement. And also I should say I hope I didn't offend any philosophers in my earlier post, my comments were in jest I assure you. Ok then, I still have to...
  23. J

    The use of probability in QM

    I didn't mean images of atoms as such. I mean the mathematical description of the atom in QM, which leads to a probability distribution for the electron(s) and hence describes it's geometry intuitively as a 3d object, which is in accordance with observation of the 3d structure of molecules etc...
  24. J

    The use of probability in QM

    Thanks for the replies so far, Maui, I'm not sure it's wise to leave the deeper issues to philosophers lol. I'm just wondering you see, if the actual 3 dimensional structure of an atom (carbon for instance) is described by a probability function, and cannot be described at all classically, isn't...
  25. J

    The use of probability in QM

    I watched this video http://www.youtube.com/watch?v=aJ0FVez0FSc&list=UU_fHG6JygMd7oIvQ5S_cSIg&index=7&feature=plcp and the guy says that we don't know wether probability is a fundamental description of the particle or wether it is because of our lack of knowledge of the underlying system (ie as...
  26. J

    Question about the double-slit experiment.

    A proper explanation of it all can be found here
  27. J

    What branch of mathematics to study to understand Quantum Mechanics?

    These video tutorials on youtube work through the basic mathematical concepts of quantum mechanics. The project is ongoing but well worth a look if you want an introductory level understanding of the subject. check it out http://www.youtube.com/user/physicsacademy?feature=results_main
  28. J

    Rigorous Quantum Mechanics text or online

    This looks like a good place to start http://www.youtube.com/user/physicsacademy?feature=results_main Hope that helps
  29. J

    Question about Schrodinger equation

    here is a good description of the equation
  30. J

    Pauli matrices: tau vs sigma

    The sigma 3 matrix and the tau 3 matrix are both the same matrix, so are sigma 2 and tau 2, and sigma 1 and tau 1. It is called a sigma matrix when acting on sigma and a tau matrix when acting on tau. It doesn't matter which one you call sigma and which one you call tau, it works out the same...
Top