Doppler Shift
The Doppler Shift of light is the change in frequency of a wave in relation to an observer who is moving relative to the wave source. It was named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842. Light waves from a moving source experience the Doppler shift as either a redshift or blueshift in the light's frequency. When an object approaches the observer its light will blueshift, and when it recedes from the observer its light will redshift.
Discussions on this topic typically ask how the galaxies can be redshifted if they are not receding away from the observer at very high speeds, as is suggested by the traditional expanding universe model. An answer to this query is that the Doppler Shift of light is only one interpretation for the redshifts. A page at the University of North Carolina explains:
http://www.cs.unc.edu/~plaisted/ce/redshift.html (Archive)
“ As noted earlier, a galaxys' redshift may not be a Doppler shift, it is the currently commonly accepted interpretation of the red shift, but there can be and are other interpretations. A galaxys' redshift may be a fundamental property of the galaxy. Each may have a specific state governed by laws, analogues to those in quantum mechanics that specify which energy states atoms may occupy. Since there is relatively little blurring on the quantization between galaxies, any real motions would have to be small in this model. Galaxies would not move away from one another; the universe would be static instead of expanding. ”
Leif Homlid
Leif Holmlid, Professor emeritus of Atmospheric Science at the University of Gothenburg (bio), makes a similar suggestion:
Quantized Redshifts of Galaxies: Stimulated Raman Scattering in Cold Intergalactic Rydberg Matter
Introduction
“ The recent finding that redshifts from galaxies in the local supercluster are quantized (Guthrie and Napier, 1996) is very important. It confirms earlier claims (Tifft, 1976, 1977; Tifft and Cocke, 1984) and requires new directions of investigations about the form of our universe. These observations are different from the generally accepted interpretation of the redshifts as due to line-of-sight receding velocities caused by the expansion of the universe, since it seems highly unlikely that such unrelated velocities should have a common quantization. Other possibilities must thus be investigated, and the immediate interest must of course be directed towards the common factor for such redshifts, namely the intergalactic medium. ”
Conclusion
“ The quantized redshifts observed in several studies of H I 21 cm redshifts from galaxies are proposed to be due to shifts of photon energy by electronic excitations in intergalactic RM through a stimulated Stokes Raman process. The rather simple quantized nature of the redshifts is due to the two-dimensional planar form of the RM clusters, which gives a constant energy spacing between the electron translational states in the conduction band. The excitation level at n = 175 of the intergalactic RM deduced from the redshifts is in reasonable agreement with earlier studies. ”
Alternative Redshift Theories
plasma-universe.com lists a number of alternative redshift theories at https://www.plasma-universe.com/redshift/ (Archive)
“ Alternative redshift theories are those that are presumed to have not been caused by one of three generally accepted causes of redshift (i.e. 1. Cosmological, 2. Doppler and 3. Gravitational). In 1981, French cosmologist and astrophysicist Henri Reboul discovered that over thirty categories of redshift theories have been proposed over the years in over 200 papers. Alternative theories still appear in peer-reviewed literature (see examples below), and alternative redshift theories are discussed in conferences [1] [2]. Such theories have been proposed for many reasons, such as dissatisfaction with the explanation of cosmological redshift [3], and as an alternative interpretation of astromomical and laboratory observational data. ”