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8.5: Notas al pie

Última actualización

30 oct 2022
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- 8.4: Relatividad General (opcional)
- 8.E: Relatividad (Ejercicios)

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A. Einstein, “Sobre la electrodinámica de los cuerpos móviles”, Annenen der Physik 17 (1905), p. 891, tr. Saha y Bose.
Bailey en al., Nucl. Phys. B150 (1979) 1
http://arxiv.org/abs/0908.1832
Un objeto de doble masa que se mueve a la mitad de la velocidad no tiene la misma energía cinética. La energía cinética depende del cuadrado de la velocidad, por lo que cortar la velocidad a la mitad reduce la energía en un factor de 1/4, lo que, multiplicado por la masa duplicada, hace 1/2 la energía original.
Einstein originalmente describió la distinción entre las dos teorías diciendo que la teoría especial se aplicaba a marcos de referencia no acelerantes, mientras que la general permitía cualquier marco en absoluto. El consenso moderno es que Einstein estaba malinterpretando su propia teoría, y que la relatividad especial en realidad maneja los marcos acelerados muy bien.
arxiv.org/abs/1310.8214

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