Relativity and Cosmology

    

A Relatividade do Segundo Postulado da Teoria da Relatividade

Authors: Gerson R. Ouriques; Méricles T. Moretti

Two postulates formulated in the beginning of the past century deal with several physical phenomena related to Relativity Theory. In the second postulate, compounded by two affirmations in one single phrase, Einstein stated: (1) the speed of light in the empty space is constant, and; (2) the speed of light is independent of the source velocity. Possibly wishing to emphasize this new paradigm where the speed of light is the fundamental element, Einstein did not pay too much attention when enouncing the second part of the postulate for situations including objects with velocities much slower than that of the speed of light. As a consequence, we discuss in this paper, the elaboration of the second part of the second postulate of the relativity theory as it appears in physics didactic books, basic, intermediated and in specific books on relativity. We will show through discussions and simple examples,how the second postulate originates several meaning both as a statement and as a concept of postulate. Keywords:

Comments: This paper has 18 pages, writting in portuguese language. It has several figures illustrating, for a better assimilation of the content, the meaning of the statement and concept of the postulate. in it

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[v1] 2020-03-06 16:29:21

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