Wikipedysta:Ataleh/Brudnopis2: Różnice pomiędzy wersjami

 

 

Einstein postulated that the [[speed of light]] in [[free space]] is the same for all [[observer (special relativity)|observers]], regardless of their motion relative to the light source. This postulate stemmed from the assumption that [[Maxwell's equations]] of [[electromagnetism]] (which predict a well-defined speed of light in vacuum) hold in any [[inertial frame of reference]]<ref name=Gabriel>{{cite book |title=Introduction to the Theory of Relativity |author=Peter Gabriel Bergmann |url=http://books.google.com/?id=3cE9jXr_QhwC&pg=PA3&dq=reference+frame+%22coordinate+system%22+choose |isbn=0486632822 |edition=Reprint of first edition of 1942 with a forward by A. Einstein |publisher=Courier Dover Publications |pages=''xi'' |year=1976 }}</ref> rather than, as was previously believed, just in the frame of the aether. This prediction contradicted the laws of [[classical mechanics]], which had been accepted for centuries. Einstein's approach was based on [[thought experiment]]s, calculations, and the [[principle of relativity]] (that is, the notion that all physical laws should appear the same to all inertial observers). Today, scientists are so comfortable with the idea that the speed of light is always the same that the [[metre]] is now defined as "the length of the path travelled by light in vacuum during a time interval of {{nowrap|1/299 792 458}} of a second."<ref>{{cite web | url = http://www.bipm.org/fr/CGPM/db/17/1/ | title = {{lang|fr|Définition du mètre}} | accessdate = 2008-10-03 | year = 1983 | work = {{lang|fr|R&eacute;solution 1 de la 17^e r&eacute;union de la CGPM}} | publisher = [[Bureau International des Poids et Mesures]] | location = Sèvres | language = French | quote = {{lang|fr|Le m&egrave;tre est la longueur du trajet parcouru dans le vide par la lumi&egrave;re pendant une dur&eacute;e de {{nowrap|1/299 792 458}} de seconde.}}}} English translation: {{cite web | url = http://www.bipm.org/en/CGPM/db/17/1/ | title = Definition of the metre | accessdate = 2008-10-03 | work = Resolution 1 of the 17th meeting of the CGPM}}</ref>