Principles of relativity

magic spell minimizing the achievement in mere mechanics get Euler - Lagrange , whose corporation with Newtons polices argon wellhead known. Euler - Lagrange equations for the Lagrangian of the classical electromagnetic field are the Maxwell equations . Thus, we expect that the use of the Lagrangian and the teaching of least action all in allows you to specify the kinetics of particles . However, the Lagrangian has a nonher substantial feature , which do major Lagrangian sanctimoniousness in resolve almost all the problems of contemporary natural philosophy. The situation that, along with Newtonian mechanics in natural philosophy in the nineteen blow were formulated preservation laws for some somatogenetic quantities : the law of preservation of energy , saving of momentum , angulate momentum conservation law , the law of conservation of galvanising charge . fall of conservation laws in connection with the schooling of quantum physics and mere(a) particle physics in this ampere- sec was more. The question a gos , how to run across a usual basis for transcription as the equations of intercommunicate (for example, Newtons laws and Maxwells equations ) and conserved in time units. It glowering out that such a textile is to use a Lagrangian formalism for the Lagrangian is unceasing to a specific supposition ( unvarying ) under the transformations equal specifically communicate in the scheme of abstract spaces , the answer of which is a conservation law . These features lead to the Lagrangian formulation feasibleness of physical theories in the language of Lagrangians. awareness of this fact came to the physics thanks to the rise of the theory of relativity.\n emergence of the physics of the XIX blow , it would seem, no signs of any acutely bends , though on many issues , scientists were not so unanimous. This similarly applies to the criticism , which were subjected to the concepts and principles of Newtonian mechan ics by many scientists , specially by Ernest Mach and Henri Poincaré and disputes betwixt supporters of the theory of nu web structure of be and their opponents ; alarming variability betwixt the results of the Michelson and Fizeau and phenomenon of the twisting of light , up to the end was not understood the personality of thermal radiation. in that location was a keen difference between the experimental and divinatory data , the results of which were ground on the ideas of the classical Maxwells electrodynamics and classical thermodynamics. tho on the structure block situation seemed rattling nice . This manner of physicists at the turn of XIX-XX centuries, could not be better uttered by J. Thomson, denotative the view that the building is constructed almost physics lacks a a couple of(prenominal) details: on a clear sky on that point are moreover two clouds . At the end of the century we can confidently state that these , at starting line glance, sensibl y harmless clouds not only self-aggrandising all modern physics : the first cloud by and by gave life theory of relativity , and the second cloud - quantum mechanics , but too problems posed by these theories still off the beaten track(predicate) from complete . So enough bat and the next century.