Showing papers on "Special relativity (alternative formulations) published in 1975"

A singularity-free solution for a charged fluid sphere in general relativity

Abstract: A singularity-free solution was obtained for a static charged fluid sphere in general relativity The solution satisfies physical conditions inside the sphere

Motion of a body in general relativity

Abstract: A simple theorem, whose physical interpretation is that an isolated, gravitating body in general relativity moves approximately along a geodesic, is obtained.

Diffusion Models with Relativity Effects

Abstract: In this paper models for diffusion in one dimension are obtained which are based on correlated random walks. The equations for diffusion with drift can be transformed into the equations for diffusion without drift (and conversely) by the transformations of Special Relativity Theory. The relationship of these equations to Maxwell's equations for electromagnetic phenomena is discussed.

Crossing Relations Derived from Extended Relativity

Abstract: Recently, Special Relativity has been straightforwardly extended to Superluminal inertial frames and faster-than-light objects. The ‘Extended Relativity’ theory not only allowed building up a self-consistent ‘classical theory’ of tachyons, but reveals itself useful also for the understanding of standard (subluminal) physics, i.e. of usual particles. In this paper, it is shown that Extended Relativity allows: (i) deriving the usual ‘Crossing Relations’ of elementary particle (high-energy) physics; and (ii) deriving the CPT-covariance theorem as a particular case of G-covariance (i.e., covariance under the new group of Generalised Lorentz transformations, both subluminal and Superluminal). In this framework, the ‘Analyticity’ postulate is unnecessary: it is better substituted by the G-covariance requirement. Moreover, new ‘crossing-type’ relations are predicted on the basis of mere Extended Relativity. They may well serve as a test for relativistic covariance of ‘force fields’ like strong interactions and, particularly, weak interactions, and possible new ‘interaction fields’ (whicha priori are not relativistically covariant).

Toward a unified field theory of gravitation and strong interactions

Abstract: The chiralSU(3) quark model is shown to be a consequence of general relativity for Petrov type Id space-times, in much the same way that the Dirac equation is a consequence of special relativity.

On Teaching the Lack of Simultaneity.

Abstract: A lecture demonstration–thought experiment is described that has been effective in teaching the concept of the lack of simultaneity in introductory physics courses. The demonstration experiment can be used for studying the relationship between simultaneity and causality and as a conceptual device for analyzing the lack of simultaneity in special relativity thought experiments.

Teaching special relativity

Abstract: The article describes an introductory course which does not presuppose Newtonian mechanics. In this course an explicit derivation of newtonian mechanics as a particular case of special relativity precedes the teaching of newtonian mechanics.

On the mach principle and general relativity

Abstract: 1 The first misunderstanding I wish to discuss is Woodward's and Yourgrau's claim, based on my [1972a] that it is my 'view that the bulk of the inertia of an object is created locally by vacuum polarisation effects'—'a view that is almost undoubtedly false in view of the results obtained through mass and charge renormalisation in quantum electrodynamics'. As to the first part of this quotation, what I was referring to in my [1972a] as the major local contribution to the inertia of an elementary particle, is the matter of the real electron-positron pairs (needed in any case to explain many of the other observed physical properties of the microscopic domain of matter). This influence of the background pairs for any observed elementary particle manifests itself in terms of the curvature of space-time—which their existence implies, in accordance with theory of general relativity. With this theory, the curvature of space-time was shown to relate directly, in an explicit mathematical fashion, to the inertia of an observed elementary particle. Thus, the mass of the elementary particle is an explicit function of the other matter of the assumed closed system of general relativity theory—in full accord with the requirement of the Mach principle. A point that I emphasised in my [1972a] was that the contribution of the distant stars to the curvature field at the site of the observed electron is of negligible importance in comparison with the contribution to this field from the pairs of the background. Thus the Mach principle is being exploited in this derivation, but without the need to introduce astronomical factors (a view that Mach himself believed to be the easel). The details of the theoretical development were referred to in my [1972a]. Had the authors checked this reference, they would have seen that my result has nothing to do with quantum electrodynamics or the renormalisation method—which in fact are rejected, both conceptually and mathematically, in the field theory I refer to. Nor is my result related in any way to the other works they cited, by Tomozawa, and by Sakurai, which do relate to quantum electrodynamics.

Stationary-to-stationary solutions in relativity theory

Abstract: Stationary axially symmetric solutions claimed to be original by Kloster, Som and Das (1974) are in fact known. A technique for derivation of the class of solutions is given.

Elementary systems in general relativity

Abstract: The problem of definition of elementary systems in general relativity is analyzed and some current theories are compared. A definition of dynamically free local elementary systems in general relativity is proposed, taking into account the influence of the gravitational field arising from the intrinsic dependence of the symmetry groups on the field.

Classical physics and relativity

Abstract: General Relativity and Gravitation | HomeCourses | Physics | UIUCMastering Physics Solutions Chapter 29 Relativity A Plus Quantum Physics Definition & Formula | Classical Physics The Problems with Classical PhysicsFootball Physics: The Forces Behind Those Big HitsSpecial Theory Of Relativity Einstein’s Theory Of Classical Physics Forum | Physics ForumsClassical mechanics WikipediaviXra.org e-Print archive, Classical PhysicsAlbert Einstein (stock footage / archival footage) YouTubePhysics < University of California, BerkeleyThree Failures of Classical PhysicsWhy are General relativity texts so much more formal Physics Simple English Wikipedia, the free encyclopediaphysics | Definition, Types, Topics, Importance, & Facts Department of Physics < MITLecture Notes | Relativity | Physics | MIT OpenCourseWarePhysics Flash AnimationsPhysics | Graduate SchoolClassical physics WikipediaPhysics (PHYSICS) < University of California IrvinePhysics Laws, Concepts, and PrinciplesPhysics | MIT OpenCourseWare | Free Online Course MaterialsGeneral Relativity » Department of Mathematics

The Theory of Rest-Mass Quantisation

Abstract: The general relativity concept of density-dependent space-curvature and the mass-energy relation of special relativity indicate a rest-mass quantisation rule which makes it possible to account for the interconversion of mass and energy in a simple manner and obtain the known quantum postulates as corollaries, thereby throwing new light on the nature of matter and radiation, the uncertainty principle, and the structure of elementary particles.