Synthesis philosophica, Vol. 21 No. 2, 2006.
Izvorni znanstveni članak
Absolute and Everlasting in Einstein’s Relativity
Ivica Picek
Sažetak
Pointing to the importance of invariance principles (symmetry laws) has been ranked as one of Einstein’s greatest merits. The symmetries represent an additional category used in a description of the physical world, additional to initial conditions and the very laws of Nature, as distinguished by Newton. Some invariances related to space and time are easy to describe: that the laws of nature are the same everywhere, that they are time independent, and that they do not change if some physical system is subjected to a rotation around an axis in space. The relativistic invariance, which Einstein re-established in his special relativity, was based on giving a full physical meaning to the transformations which Lorentz used to relate observers moving uniformly with respect to each other. He realized that there is no absolute “at rest”, and no sensible “simultaneous” events. What is absolute in his relativity is the constant speed of light, and a well defined proper-time interval. The relativity entered physics as the first great creative principle on Einstein’s list. Subsequently, its marriage to the quantum principle established in atomic physics, brought out the quantum field theory as a mighty tool for the future investigation of the subatomic world. The newly discovered fundamental interactions (weak and strong) urged to look for a principle explaining them. It has been found in the form of the gauge principle underlying the present day standard model of elementary particle interactions. It is remarkable that Einstein gave his magical touch also to quantum and gauge principles. Still, the most important Einstein’s idea is that the whole of physics has to be expressed in Minkowski’s space, subject to Lorentz transformations. Today we are aware that, like other symmetries with their restrictions, Lorentz symmetry would be restricted to the non cosmological scale. New ideas in conjunction with the forthcoming cosmological measurements may lead to astonishing results.
Ključne riječi
the absolute; everlasting; relativity; invariance principles; quantum principle; Albert Einstein
Hrčak ID:
12416
URI
Datum izdavanja:
29.12.2006.
Posjeta: 2.521 *