Review
Version 1
Preserved in Portico This version is not peer-reviewed
Review on the Minimally Extended Varying Speed of Light Model
Version 1
: Received: 4 March 2024 / Approved: 5 March 2024 / Online: 5 March 2024 (06:31:42 CET)
A peer-reviewed article of this Preprint also exists.
Lee, S. Review on Minimally Extended Varying Speed of Light Model. Particles 2024, 7, 309-326. Lee, S. Review on Minimally Extended Varying Speed of Light Model. Particles 2024, 7, 309-326.
Abstract
It has been known that dimensional constants such as ℏ, c, G, e, and k are merely human constructs whose values and units vary depending on the chosen system of measurement. Therefore, the time variation of dimensional constants lacks operational significance due to their dependence on them. It is well-structured and represents a valid discussion. However, this fact only becomes a meaningful debate within the context of a static or present universe. As well-established theoretically and observationally, the current universe is undergoing accelerated expansion, wherein dimensional quantities, like the wavelength of light, also experience redshift phenomena elongating over cosmic time. In other words, in an expanding universe, dimensional quantities of physical parameters vary with cosmic time. From this perspective, there exists the possibility that dimensional constants, such as the speed of light, could vary with the expansion of the universe. In this review paper, we contemplate under what circumstances the speed of light may change or remain constant over cosmic time, and discuss the potential for distinguishing these cases observationally.
Keywords
varying speed of light models; standard cosmological model; Robertson-Walker metric; physical constants; Hubble parameter
Subject
Physical Sciences, Astronomy and Astrophysics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment