I've moved this topic as its veered well into New Theory territory.
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Don't put out books and numbers, if you cannot explain just say it, say we don't know yet is better answer.
This site has some interesting representations of what matter waves may look like.
Quote from: Bill SPossibly that’s what you meant by: “…the field is too small to be defined at that distance.”Yes. Exactly. Also there are uncertainty relations with regard to the components of the fields that have to be taken into account too.
Think about how you'd measure such a field. In classical electrodynamics you choose what's called a test charge which is a charge you use to determine the value of the field at a given point and you make much much smaller than the charge which whose field you're measuring. You can't do that with a proton since the electron has the same charge. Then you'd have to precisely measure the location of the source charge and the test charge which can't be done due to the uncertaintly principle, especially since you want to measure the force on the charge and force. And force is not an observable in quantum mechanics so all you can do is find the expectation value of it and <f> = d<p>/dt. Since there's some uncertainty in p this means that there is some uncertainty in <f> and therefore the proton's electric field. So the field can be so small as to be measured to be zero if the uncertainty is too large.
But this is too complicated for me to determine myself. Perhaps JP can do the calculations? What do you say JP?
Does anyone know of instances where Metamaterials have been used in clothing to alter the perceived body shape and reduce the appearance of large girth? Not invisibility but towards idealized shape.
Quote from: JPAs chiralSPO's answer said, lasers are coherent, which is a requirement for them to not spread out.Actually that's not what chiralSPO said, exactly. He said that laser light spreads out much more slowly. By the time that the beam gets to, say, the moon, it's spread ot by miles, perhaps by hundreds of miles even.
Quote from: jeffreyHActually Bell's Theorem states that there are no LOCAL hidden variables.Yeah. I know. I'm just tired of putting in the "Local" all the time.
You do understand what a local hidden variable is, don't you? A local hidden variable theory is a hidden variable theory in which distant events are assumed to have no instantaneous (or at least faster-than-light) effect on local events.
Quote from: JPIt may actually be a collection of elementary light particles, and not an elementary particle itself.
That would raise a few questions.
1. Would this imply that the quantum of EM energy was smaller than a photon?
2. Might it be that such light particles could occur only in discrete collections?
3. If it’s “yes” to question 2, would the photon – although not elementary – still count as the quantum of light?
JP I know that I can't get more energy out then I put in, that's why it takes energy to flip the polarity of one of the magnets by doing so you change the polarity of the other magnet through induction electricity is induced into a nearby wire via the change in the magnetic field of the magnet. I understand that this connection would be quite fragile and you may only be able to do a "flip ones trick".
But a flip ones trick is all that's needed to prove this concept!
I am nnot sure I understand this, but the following can be stated in general: Existing spacecraft are launched by multi-stage rockets that harness the fact that energy from a prior stage is transferred kinetically to the fuel in subsequent stages, so that when they finally ignite, they are doing more work on the remaining payload than simply the energy supplied by their own combustion. However, you must have all the necessary early stages in order that the later stages will enjoy this advantage. That still can take a lot of fuel. As long as chemical popellants are the energy source, there are certain limitations. An innovative new way of overcoming such limits is the ion engine. In it, the propellant is not burned, but is electromagnetically accelerated using another source of energy, such as solar panels. These kinds of engines are much more efficient than regular engines, and one such space craft is currently flying and, thanks to the engine, will be able to stop at one asteroid, examine it, and then to on for a second mission to another.
Yes I agree Oberth effect is really difficult. I think because its mechanism nobody studied in detail ( limited to the formulas and application on the orbital maneuvers) - it happens often ,if something is not clear given the name and measured quantitative part.