Physics – Classical Physics
Scientific paper
2004-11-04
Annales de la Fondation Louis de Broglie, volume 30, n{\deg}3-4, 2005
Physics
Classical Physics
17 pages, 2 figures, talk given at PIRT 2004 Conference, Imperial College, London, 5 September 04
Scientific paper
We show that the image by the Lorentz transformation of a spherical (circular) light wave, emitted by a moving source, is not a spherical (circular) light wave but an ellipsoidal (elliptical) light wave. Poincare's ellipsoid (ellipse) is the direct geometrical representation of Poincare's relativity of simultaneity. Einstein's spheres (circles) are the direct geometrical representation of Einstein's convention of synchronisation. Poincare adopts another convention for the definition of space-time units involving that the Lorentz transformation of an unit of length is directly proportional to Lorentz transformation of an unit of time. Poincare's relativistic kinematics predicts both a dilation of time and an expansion of space as well.
Pierseaux Dr Yves
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