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    Grandmaster RascalPuff is a glorious beacon of light RascalPuff is a glorious beacon of light
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    Auxiliary T.O.E. Pt I

    EINSTEIN ON PHYSICS AND REALITY

    The following points are made by A. Einstein and L. Infeld (citation below):

    1) What are the general conclusions which can be drawn from the development of physics? Science is not just a collection of laws, a catalogue of unrelated facts. It is a creation of the human mind, with its freely invented ideas and concepts. Physical theories try to form a picture of reality and to establish its connection with the wide world of sense impressions. Thus the only justification for our mental structures is whether and in what way our theories form such a link.

    2) We have seen new realities created by the advance of physics. But this chain of creation can be traced back far beyond the starting point of physics. One of the most primitive concepts is that of an object. The concepts of a tree, a horse, any material body, are creations gained on the basis of experience, though the impressions from which they arise are primitive in comparison with the world of physical phenomena. A cat teasing a mouse also creates, by thought, its own primitive reality. The fact that the cat reacts in a similar way toward any mouse it meets shows that it forms concepts and theories which are its guide through its own world of sense impressions.

    3) "Three trees" is something different from "two trees." Again "two trees" is different from "two stones." The concepts of the pure numbers 2, 3, 4..., freed from the objects from which they arose, are creations of the thinking mind which describe the reality of our world.

    4) The psychological subjective feeling of time enables us to order our impressions, to state that one event precedes another. But to connect every instant of time with a number, by the use of a clock, to regard time as a one-dimensional continuum, is already an invention. So also are the concepts of Euclidean and non-Euclidean geometry, and our space understood as a three-dimensional continuum.

    5) Physics really began with the invention of mass, force, and an inertial system. These concepts are all free inventions. They led to the formulation of the mechanical point of view. For the physicist of the early 19th century, the reality of our outer world consisted of particles with simple forces acting between them and depending only on the distance. He tried to retain as long as possible his belief that he would succeed in explaining all events in nature by these fundamental concepts of reality. The difficulties connected with the deflection of the magnetic needle, the difficulties connected with the structure of the ether, induced us to create a more subtle reality. The important invention of the electromagnetic field appears. A courageous scientific imagination was needed to realize fully that not the behavior of bodies, but the behavior of something between them. that is, the field, may be essential for ordering and understanding events.

    6) Later developments both destroyed old concepts and created new ones. Absolute time and the inertial coordinate system were abandoned by the relativity theory. The background for all events was no longer the one-dimensional time and the three-dimensional space continuum, but the four-dimensional time-space continuum, another free invention, with new transformation properties. The inertial coordinate system was no longer needed. Every coordinate system is equally suited for the description of events in nature.

    7) The quantum theory again created new and essential features of our reality. Discontinuity replaced continuity. Instead of laws governing individuals, probability laws appeared.

    8) The reality created by modern physics is, indeed, far removed from the reality of the early days. But the aim of every physical theory still remains the same. With the help of physical theories we try to find our way through the maze of observed facts, to order and understand the world of our sense impressions. We want the observed facts to follow logically from our concept of reality. Without the belief that it is possible to grasp the reality with our theoretical constructions, without the belief in the inner harmony of our world, there could be no science. This belief is and always will remain the fundamental motive for all scientific creation. Throughout all our efforts, in every dramatic struggle between old and new views, we recognize the eternal longing for understanding, the ever-firm belief in the harmony of our world, continually strengthened by the increasing obstacles to comprehension.

    Adapted from: The Evolution of Physics: From Early Concepts to Relativity and Quanta. A. Einstein and L. Infeld. Simon and Schuster 1938, p.254.

    Copyright by Gates, University of Virginia.
    ___________________________________

    Regards
    - RP
    Last edited by dleviwing; 05-18-2007 at 03:49 PM.
    (George Berkeley, 1710) ... lay the beginning in a distinct explication of what is meant by thing, reality, existence: for in vain shall we dispute concerning the real existence of things, or pretend to any knowledge thereof, so long as we have not fixed the meaning of those words.

    "All things come out of the one and the one out of all things." - Heraclitus
    "Reality is an illusion - albeit a persistent one." - Einstein
    "Particles give me a headache." - Ibid


 

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