Quantum Theory
Quantum physics and related topics.
2153 topics in this forum
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I think I read that string theory predicts that all things are made up of strings at the subatomic level without any proof yet. Based on this simple prediction they have theorized a lot of mathematical proof for other theories. Is that true, it is all based on a single lie?
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Is the magnetic field around the electron the same as bar magnet (rectangle magnet with north and south)
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How is information like new discoveries, quantum mechanic discoveries released into the public? Is there a main website where that happens, is it by law information must be released to public or do scientists have a belief information must be shared. How do we know so much about what scientists do and know, how is this information distributed to public and for even sites like Wikipedia to know about tons of stuff
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Through some method. Can this be experimented with.
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Title says it all I think.
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For instance hydrogen atom I think has 1 proton and 1 electron. Can you have 1 proton and 2 electrons, what is that called? Can you just add electrons or protons or neutrons to an atom or is that not allowed due to the laws of nature.
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Let us say between a proton and electron at a small distance d. They are opposite charges so they feel an electrostatic force of attraction. What about electric field. Do I just draw the lines from positive to negative for electric field?
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what are the dimensions of the double slits in comparison to the electron? what keeps the electron from decaying outside the environment of an atom long enough to run the experiment? how are the electrons detected before and after the slits?
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If you play around with the frequencies of sound, can you produce electromagnetic radiation by causing atoms to vibrate thus releasing electromagnetic radiation.
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For example, mass, spin, charge and color. What am I missing. I am learning about subatomic particles and want to know all their properties. Thanks in advance.
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Or put it better by a video I watched on you tube "the weak nuclear interaction" which still doesn't make me understand it fully. It is neither a push or pull force which makes it less intuitive but it is responsible for radioactive decay according to Wikipedia. Can someone please give me an intuitive definition of the weak nuclear force and its function.
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And does it hold protons and neutrons together in the nucleus. Can you please tell me what it specifically does, thanks in advance.
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what is the main concept of quantum theory?
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What are the available resources to get the best knowledge about quantum mechanics?
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Do you think that matter is just fluctuations of energy inside the field it has. For example the electron is a fluctuation of energy in the electron field.
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Hi guys I'm a medical student and therefore I don't have much background in quantum physics, But I was reading an article about Excitonic Circuits related to optic medical instruments and I got curious to know how can an exciton transport energy and momentum, but not mass and charge, interacting with (or advancing through) a medium?
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Who supports the idea that a positron is simply an electron going the other direction in time? According to this PBS Space Time video (at 5:50 minutes), “antimatter is time reversed matter”. Does everybody here unanimously agree with that? Why (not)?
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Hi so I don't know too much, but I was watching a video and it talked about how scientists have trouble unifying gravity with quantum physics. So I was wondering, maybe we have to take gravity out of the question because all these super tiny things are just too small for gravity to have an affect? I don't know much but just a random thought...
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Hey all. I need some of physicists who are well-versed (as anyone CAN be in that weird-ass sub-field of Physics) to settle a wage I have with my young nephew. A recent EE grad who fancies himself as an expert in QM. Though I think he drastically over-estimates his prowess in that arena. So here goes........... We're talking about Erwin Schroedinger's well-known eponymous "Dead Cat/Live Cat" metaphor. Or thought problem....or hypothetical scenario, or whatever it is. I'm nobody's physicist but I always am forever intrigued with QM and read all I can on it, and thought I was fairly well-acquainted with the paradigm that drives the S's Cat. As you know....the good like…
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Hi. Everyone I don't know for sure but I think I know why the interference pattern in the double slit experiment disappears when one of the slits is "observed" by an extra piece of apparatus. I would be very grateful for your comments. As I see it, the "observed" particles which create the double band pattern on the screen are just a subset of the other particles which do form the interference pattern and the "observed" particles happen to have a specific property which causes them to be "observed" by the extra piece of apparatus which does not observe all of the particles. When the extra piece of apparatus is removed and the interference pattern returns, t…
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Hi, I have this idea and I wonder if it's possible using to quantum theory : When using sound waves, it's known (I can't find an article about that but I read some) that we can reverse signals recorded from multiple microphones, to reemit synchronized waves (even though a complex medium) that peaks at the position of the previously recorded emiter, creating a virtual sound source. And we can even use the time-print given by the records (with some calculation) to generate any sound at this position. So could the same process be used to create a converging probability wave of particle ? We would need a big number of devices that somehow leak a wave/par…
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Quarks are said to have no internal structure, however there are many types of quarks. On the face it would seem that they are defined by properties (Mass, Spin, Charge), how do we differentiate between properties and structure when many properties are defined by particles?
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what is the size of an electron in quantum field theory? Art Hobson said that the field quanta spread infinitely
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This is not something I understand well, so I'm not sure if these questions make much sense... The Wikipedia page says: But I don't fully understand the explanation. (https://en.wikipedia.org/wiki/Neutrino_oscillation#Theory) Is the oscillation between different flavours of neutrino something that happens to a single neutrino, or is it a statistical thing that can only be observed among a number of neutrinos? I was made to think about this because of their different masses. So, if for example, there was just one neutrino in the entire universe, would it still oscillate between flavours? But then its mass would change, which would seem to violate c…
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Do neutral elementary particles respond to electromagnetic waves?
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