The aim is to test whether the cosmological redshift is due to the relative movement of the light source, distance or to the age of the light. If it were an age-dependent effect, the cosmological assumption of an expanding universe would have to be reconsidered.
Foundation
In 1929, Edwin Hubble discovered that the spectral lines of distant galaxies are shifted towards the red spectral range compared to the same spectral lines that we know from the sun. The further away the galaxies are from us, the stronger this red shift is.
The cosmological redshift was originally attributed to the expansion of the space between cosmic objects that are not gravitationally bound to each other over the course of the evolutionary history of the universe. The cosmological redshift was therefore assumed to be related to the relative movement between the source and receiver of the light. However, with ever better optically instruments stars where located, whose red shift was so large, that their speed would nearly come close to the speed of light. Thus, as a new hypothesis it was assumed that the red shift is due to the distance. But while a red shift due to the doppler effect from relative movement is conclusive and easy to understand, the arguments for a relation to distance is more obscure: MATTHIAS: PLEASE DESCRIBE ARGUMENTS. However, it is also possible that the effect does not depend neither on the movement of the light sources to each other nor on these other distance related effects, but rather simply on the age of the light. This question cannot be answered based on the light from distant cosmic objects, as a greater distance is automatically associated with a greater age of the light.
The question is prompted by our investigation into the underlying mechanics of the flow of time. Our thought experiment on a modified version of the twin paradoxzu led us to the assumption that the transition from one present G1 to a later present G2 alters the effect value S = E * t for all physical objects by the same factor. Given that no time passes for photons, their effect value can only change by modifying their energy. Consequently, light would then exhibit a red shift that is dependent on its age.
Research Challenge
To test the hypothesis, one could set up an experiment in which light is confined between two perfect mirrors and the wavelength is determined at the beginning of the experiment and after a certain time. Such an experiment would require perfect mirrors and would be easier with longer distance between mirrors and no atmosphere to interfere with the transmission of light. But with todays technology, such an experiment is not out of reach...
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