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Topic: Action at a distance (physics)

  Physics - Crystalinks
Physics is the science that deals with the structure of matter and the interactions between the fundamental constituents of the observable universe.
Physics plays an important role in all the natural sciences, however, and all such fields have branches in which physical laws and measurements receive special emphasis, bearing such names as astrophysics, geophysics, biophysics, and even psychophysics.
The ultimate aim of physics is to find a unified set of laws governing matter, motion, and energy at small (microscopic) subatomic distances, at the human (macroscopic) scale of everyday life, and out to the largest distances (e.g., those on the extragalactic scale).
www.crystalinks.com /physics2.html   (3771 words)

  Action at a distance (computer science) - Wikipedia, the free encyclopedia
Action at a distance is an anti-pattern (a recognized common error) in which behavior in one part of a program varies wildly based on difficult or impossible to identify operations in another part of the program.
The way to avoid the problems associated with action at a distance are a proper design which avoids global variables and alters data in a controlled and local manner.
One of the advantages of functional programming is that action at a distance is de-emphasised, sometimes to the point of being impossible to express at all in the source language.
en.wikipedia.org /wiki/Action_at_a_distance_(computer_science)   (638 words)

 Encyclopedia: Action at a distance (physics)
Physics (from the Greek, φυσικός (physikos), natural, and φύσις (physis), nature) is the science of the natural world dealing with the fundamental constituents of the universe, the forces they exert on one another, and the results produced by these forces.
Electromagnetism is the physics of the electromagnetic field: a field, encompassing all of space, which exerts a force on those particles that possess the property of electric charge, and is in turn affected by the presence and motion of such particles.
The question of whether this 'spooky action' at a distance constitutes a violation of the relativistic upper limit on the propagation of interaction is not straightforward.
www.nationmaster.com /encyclopedia/Action-at-a-distance-(physics)   (560 words)

 Action at a distance (physics) - Wikipedia, the free encyclopedia
In physics, action at a distance is the interaction of two objects which are separated in space with no known mediator of the interaction.
While a naive interpretation of quantum mechanics appears to imply instantaneous action at a distance, careful reasoning about these cases shows that no such effects are actually present.
Einstein coined the term "spooky action at a distance" to describe these situations, which exhibit quantum entanglement.
en.wikipedia.org /wiki/Action_at_a_distance_(physics)   (677 words)

 FIELD THEORIES: PHYSICAL FIELDS   (Site not responding. Last check: 2007-09-11)
Action at a distance had to be materially propagated; it had to be a material push or pull.
Action was not propagated through distance, but was rather the result of matter in motion, a medium of subtle particles.
Now action at a distance without a medium must occur simultaneously; however, the possibility of simultaneity was eliminated in Einstein's theory, because the velocity of light sets an upper limit on the velocity of action at a distance.
www.hawaii.edu /powerkills/DPF.CHAP2.HTM   (3728 words)

 Action at a distance - Definition up Erdmond.Com   (Site not responding. Last check: 2007-09-11)
As such an action would refute reductionism, it is held as an example of pseudoscience or magical_thinking.
Gravity was held to be an example of action at a distance, and thus the graviton was hypothesised to explain its mechanism.
This current view of action at a distance may be revised in light of increasing develops in quantum_theory, for example quantum_entanglement.
www.erdmond.com /Action_at_a_distance.html   (285 words)

 Physics Has Its Principles
This condition is called “action at a distance”, and is forbidden by the causality principle because it is logically impossible.
[2] is an argument for faster-than-light propagation of forces, not an argument for action at a distance.
The continued action of an external gravitational field after the cause of that field has permanently ceased to communicate with the outside universe is a cause without an effect.
www.metaresearch.org /cosmology/PhysicsHasItsPrinciples.asp   (4758 words)

 Action at a distance - Metaweb   (Site not responding. Last check: 2007-09-11)
Action at a Distance: The Newtonian view of the universe may be described as a mechanistic interpretation.
Whenever the nature of the transmission of certain actions and effects over a distance was not yet understood, the ether was resorted to as a conceptual solution of the transmitting medium.
After 1916 Einstein strove to produce what is now called the theory of relativity into a formulation that includes gravitation, which was still being expressed in the form imparted to it by Newton; i.e., that of a theory of action at a distance.
www.metaweb.com /wiki/wiki.phtml?title=Action_at_a_distance   (524 words)

 Ether and the Theory of Relativity by Albert Einstein
The explanation is probably to be sought in those phenomena which have given rise to the theory of action at a distance, and in the properties of light which have led to the undulatory theory.
But inertial resistance opposed to relative acceleration of distant masses presupposes action at a distance; and as the modern physicist does not believe that he may accept this action at a distance, he comes back once more, if he follows Mach, to the ether, which has to serve as medium for the effects of inertia.
Further, in contemplating the immediate future of theoretical physics we ought not unconditionally to reject the possibility that the facts comprised in the quantum theory may set bounds to the field theory beyond which it cannot pass.
www.geocities.com /antonioferrigno/ether.html   (2981 words)

 ipedia.com: Action (physics) Article   (Site not responding. Last check: 2007-09-11)
Symmetries in a physical situation can better be treated with the action principle, together with the Euler-Lagrange equations which are derived from the action principle.
The Principle of Least Action was first formulated by Maupertuis [1] in 1746 and further developed (from 1748 onwards) by the mathematicians Euler, Lagrange, and Hamilton.
More generally, an action is a functional from the configuration space to the real numbers and in general, it needn't even necessarily be an integral because nonlocal actionss are possible.
www.ipedia.com /action__physics_.html   (1546 words)

 Action at a Distance in Quantum Mechanics (Stanford Encyclopedia of Philosophy)
On this conception of action at a distance, there seems to be no reason to exclude the possibility of action at a distance in the quantum realm even if that realm is holistic or the state of the relevant systems is non-separable.
Action at a distance is a phenomenon in which a change in intrinsic properties of one system induces a change in the intrinsic properties of a distant system, independently of the influence of any other systems on the distant system, and without there being a process that carries this influence contiguously in space and time.
Action* at a distance is a phenomenon in which a change in intrinsic properties of one system induces a change in the intrinsic properties of a distant system without there being a process that carries this influence contiguously in space and time.
plato.stanford.edu /entries/qm-action-distance   (14721 words)

 Action at a Distance
A philosophical description is proposed, of the basic mechanisms of physical universe and especially of the nature of matter, that is compatible with such phenomena as instantaneous action at a distance.
It is proposed that material existence in physical space is conditioned and indeed dependent upon the existence of energy patterns necessary for matter to manifest and that interactions occur not between the material manifestations but between the primary energy patterns themselves.
Action at a distance would seem eminently possible if not probable, providing we integrate our purely physical picture of the universe with a concept of energies originating from a non-physical-universe source.
twm.co.nz /actdis_Hass.htm   (1772 words)

 Does the EPR paradox prove that quantum theory is incomplete? Philosophy of Science at AhISee - the site for Insight
Action at a distance was one of the problems Newton faced with his Principia.
The instantaneous action of gravity, which had no obvious physical mediating force, was described by detractors as 'action-at-a-distance'.
These are based on well-established assumptions, such as the limiting velocity of the speed of light and the absence of action at a distance.
www.ahisee.com /content/epressay.html   (4612 words)

 orgone physics is the rosettastone, or common functioning principle, of all action at a distance.
energy of orgone physics is the rosettastone, or common functioning principle, of all action at a distance.
family orgone physics is the rosettastone, or common functioning principle, of all action at a distance.
orgone physics is the rosettastone, or common functioning principle, of all action at a distance.
www.hscti.com /rosettastone.htm   (2679 words)

 Morphogenetic field - Metaweb   (Site not responding. Last check: 2007-09-11)
The morphogenetic field or morphic resonance is a name given to a form of action at a distance proposed by Rupert Sheldrake; However, the idea that vision was a two-way process, was held by a great many minds in the past:.
When crystals of a newly synthesized chemical substance, for example a new kind of drug, arise for the first time they have no exact precedent; but as the same compound is crystalized again and again, the crystals should tend to form more readily all over the world, just because they have already formed somewhere else.
Einstein famously derided entanglement as "spooky action at a distance."
www.metaweb.com /wiki/wiki.phtml?title=Morphogenetic_field&printable=yes   (650 words)

 Spooky action at a distance - Topic Ars OpenForum   (Site not responding. Last check: 2007-09-11)
One of the Soapbox regulars, Garet_Jax has been pimping the latest in "spooky" fun with quantum physics to the news staff.
Physics News Update brought word of a proposed holographic scheme using entangled pairs of photons.
Each photon in an entangled pair has properties (such as momentum or polarization) that are unknown until a measurement is performed on one photon or the other.
episteme.arstechnica.com /6/ubb.x?a=tpc&s=50009562&f=174096756&m=4690925533&r=4690925533   (330 words)

 Nothing That Matters: Action at a Distance Explained
If we just try to look at the world from the point of view of a photon - lot of things like action at a distance etc become logical.
Therefore two photons actually may be touching each other but for us humans thay appear to be distance apart since we donot suffer the space- dilation.
What to us is action at a distance is only a action at handshaking distance for two photons.In fact same dilation in time can obliterate cause and effect sequencing for photonic phenomenon.
nothing-that-matters.blogspot.com /2005/02/action-at-distance-explained.html   (298 words)

 Bell's Theorem: Physics
The classical theory of physics which was held from the time of Newton until this century provided an orderly model of a world made of objects moving around and pushing each other around in predictable ways.
The way many physics experiments are done is that you send a particle into a detector and the detector gives some output indicating the result of some measurement it performs on the particle.
Spooky action at a distance is part of nature.
www.ncsu.edu /felder-public/kenny/papers/bell.html   (7601 words)

 Spooky Action at a Distance
Re: Spooky Action at a Distance -- DocN 5/16/03 (
Re: Spooky Action at a Distance -- DickT 5/15/03 (
Re: Spooky Action at a Distance -- dlgoff 5/16/03 (
superstringtheory.com /forum/partboard/messages20/139.html   (250 words)

The distance between the selected branches was thirty two and a quarter feet, the altitude difference between them was roughly eleven and half feet down.
Evidently, the procedure of life is nearly equivalent to practicing experimental physics and accumulating applicable conclusions by constantly adjusting the theories of anticipation based on experimental data.
The point is that Modern Physics has finally shown in the seething vacuum, that the mathematics of an action at a distance universe leads back to its own origin.
www.westworld.com /~srado/IDEALGAS2b.html   (5460 words)

One of the most critical problems is the difficulty of measuring the physical motion of humans, partly because their movements are so unpredictable.
The experimental results also showed that the spin picked up by the ball is closely related to the coefficient of friction between the foot and the ball, and to the offset distance of the foot from the ball's center of gravity.
First, if the offset distance increased, then the foot touched the ball for a shorter time and over a smaller area, which caused both the spin and the velocity of the ball to decrease.
www.soccerballworld.com /Physics.htm   (2426 words)

 Spooky Action
According to classical physics, prior to measurement, every property of a system possesses a definite but unknown value, and experiment or observation merely reveals the value of that previously unknown property.
However, it does not deny, as is frequently erroneously claimed, the existence of the physical object itself in the absence of observation.
Realism, for the present purposes, might be described briefly as the philosophical belief that an experimental result is determined by a physical property of the system under study whose existence is independent of the experiment or the experimenter.
www.users.csbsju.edu /~frioux/spooky/spooky.htm   (2392 words)

 Outline - Electric Fields- Physics 106
In (b) the +dq symmetrically disposed elements (the distance r from each element is the same) urge a positive test charge away from them.
We are often interested in cases for which the distance from the center of the dipole to the point P where we wish to find the electric field is much greater than d the distance of separation of the charges.
Again for great distances, E is inversely proportional to the cube of the distance from the center of the dipole.
www.wellesley.edu /Physics/phyllisflemingphysics/106_o_electric.html   (1426 words)

 Sidelights on Relativity   (Site not responding. Last check: 2007-09-11)
But it is my conviction that in the present stage of development of theoretical physics these ideas must still be employed as independent ideas; for we are still far from possessing such certain knowledge of theoretical principles as to be able to give exact theoretical constructions of solid bodies and clocks.
For it is not a difficult task to determine the physical state of a measuring-rod so accurately that its behaviour relatively to other measuring-bodies shall be sufficiently free from ambiguity to allow it to be substituted for the “rigid” body.
For even when it is a question of describing the electrical elementary particles constituting matter, the attempt may still be made to ascribe physical importance to those ideas of fields which have been physically defined for the purpose of describing the geometrical behaviour of bodies which are large as compared with the molecule.
www.blackmask.com /books115c/slrtv.htm   (7167 words)

 New Page 0
The epistemological layers of the theories of physics are not the layers of the material physical reality (like for instance that,a group of stars and planets, a glass of water, or the electromagnetic field of a coil are of different material layer and scale).
Their physical properties are described by quantities that can be derived also not only by experimental measurements but also by statistical and stochastic quantities of the previous non-observable (with simple laboratory instruments) layer.
In this way any physical system must also have external influences, so that it can not be isolated, but these influences are also physical (and not from "emptiness") so that the principle of sufficient physical causes is not abandoned.
www.softlab.ntua.gr /~kyritsis/PapersinPhysics/LayersPhysics.htm   (6741 words)

 BBC NEWS | Science/Nature | Quantum computer draws closer
Published in the journal Science, the results represent the latest advance in a broad scientific effort to apply properties of quantum physics to the creation of a new generation of supercomputers.
He believed there was something profound in the phenomenon and that buried in its seeming absurdity lay something that could overthrow quantum mechanics - a successful theory of the way the Universe behaves on the atomic and sub-atomic level.
According to some, a computer based on quantum entanglement would not be bound by those limits as it would use "spooky action at a distance" instead of electrons or photons.
news.bbc.co.uk /1/hi/sci/tech/3043731.stm   (558 words)

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