What is the tired light?
The theory of tired light seeks to provide an alternative explanation for the redshift observed in distant galaxies, which is usually explained by the expansion of the universe. According to this theory, the energy carried by photons of light is somehow scattered as they travel through the universe, leading to an increase in wavelength, so that the light is shifted towards a longer wavelength, less energy, red end of the spectrum. The theory of the Big Bang of the Universe explains this redshift as because of the Doppler effect. On the other hand, the tired light hypothesis is compatible with the models of the stable state of the universe. It can be argued that this explanation for Redshift has not been comprehensively refuted, but the vast majority of astronomers and cosmologists prefer the theory of the Big Bang because it looks neatly explaining a number of observations that causes serious problems for the tired light model. However, the process of light energy is distributed over long distances is problematic. The most visible process - interactionLights with particles in space - was quickly rejected by Zwicky himself, because this would result in a scattering of light, which in turn would portray images of distant fuzzy or blurry galaxies. Observations of distant galaxies do not show this gloomyness. Zwicky preferred an alternative explanation involving light affected by gravity, but this idea remains essentially speculative.
There are a number of other problems with the theory of tired light, one of which concerns the perceived brightness of galaxies. For two similar galaxies at very different distances, in a static universe, calculated apple surfaces - based on the amount of light, which the galaxy truly radiate under the sky that occupies when observed from the ground - should be approximately the same. This is because the amount of light that gets to us and the area of the galaxy - as can be seen from the ground - decreases with distance at the same speed. Superficial brightnessGalaxy would be reduced by a red shift; However, observations show a much greater brightness reduction than only Redshift can be taken into account. This can also be explained to the expanding universe, where the more distant galaxy recedes faster. Obviously it is not a settled thing and it is not a crucial point to argument.
Another problem of theory is that it does not explain the formula of light emissions over time shown by the events of supernova. The time needed for the light from supernova to fading, as seen from the ground, increases with the distance of supernova. This is in line with the expanding universe, where the time expansion effects caused by special relativity of Bekome more important with increasing distance and faster recession.
One of the strongest pieces of evidence for the Big Bang Theory is the radiation of the cosmic microwave background (CMB) discovered in 1956. The theory of tired light can explain this radiation in the background as the star light that has lost energy over timeLiner length, but the theory does not explain radiation. In both theories, the number of photons remains the same, but in the theory of tired light they are distributed in the same volume of space, while in the expanding universe photons were diluted in the expanding space. These contrasting scenarios lead to different spectrums for CMB. The observed spectrum of CMB is in line with the theory of the Big Bang.
In addition to the main objections described above, there are a number of other problems for the uncommon universe indicated by the theory of tired light. These include Olbers' Paradox, proportions of chemical elements that today appear in space and rich evidence that the universe has changed over time. Supporters tried to provide answers - in accordance with the tired lighting model in some form - to all these objections, but most scientists in the field of astrophysics and cosmology consider the theory to be affiliated to marginal physics.