Tired light

The tired light is a theory attempt suggested by Albert Einstein to reconcile his assumption of static universe with the observation of the expansion of the universe. The latter being deduced from the observation of a Shift towards the red proportional to the distance for the galaxies, this idea was also recommended by Fritz Zwicky in 1929 like possible alternative explanation. The expression was invented so much close to Richard Tolman - as alternative interpretation of Georges Lemaître and Edwin Hubble of shift towards the cosmic red. Lemaître and Hubble believed that the cosmic red shift was caused by the drawing of the light waves while they travel by the space of extension. Fritz Zwicky believed that the cosmic red shift was caused by Photon S gradually losing energy above the distance, probably due to resistance to the fields of Gravitation between the Source and the Détecteur.

Einstein had put forth the assumption that the light can, for a reason not specified to lose proportionally energy at the distance covered, from where the name of “tired light”. So for an individual photon the tired light is indistinguable assumption of the expansion of the universe, it makes different predictions in certain contexts. In particular, a distribution of photons presenting a spectrum black Corps guard, even if it is not with the thermal balance a spectrum of black body because of expansion of the universe, with a Température which decrease during time. In the case of the traditional tired light, a spectrum of black body is deformed during time.

Criticisms

The cosmological diffuse Fond represents the whole of the photons resulting from the dense phase and heat which the paramount Univers knew. They do not interact with the current matter, because of too weak density of this one. The cosmological diffuse bottom had a spectrum of black body in the past owing to the fact that it was, whereas the universe was very dense and very heat, in interaction with the matter. Since, these interactions ceased, approximately 380 000 years after Big Bang (time known as of the recombination). It is observed today that the cosmological diffuse bottom still has a spectrum of black body (it is even the black body most perfect known). This observational fact established at the beginning of the Années 1990 by the satellite COBE (and which was worth the Nobel Prize of physics 2006 with the person in charge of instrument FIRAS having made it possible to establish result, John C. Mather) proves the disability of the traditional model of the tired light.

More recent models

References and sources

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