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arXiv:1605.08634 (physics)
[Submitted on 25 May 2016]

Title:On The Relativity of Redshifts: Does Space Really "Expand"?

Authors:Geraint F. Lewis
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Abstract:In classes on cosmology, students are often told that photons stretch as space expands, but just how physical is this picture? Does space really expand? In this article, we explore the notion of the redshift of light with Einstein's general theory of relativity, showing that the core underpinning principles reveal that redshifts are both simpler and more complex than you might naively think. This has significant implications for the observed redshifting of photons as they travel across the universe, often refereed to as the cosmological redshift, and for the idea of expanding space.
Comments: 6 pages, 5 figures, appeared in Australian Physics
Subjects: Popular Physics (physics.pop-ph); Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Report number: GFL-001
Cite as: arXiv:1605.08634 [physics.pop-ph]
  (or arXiv:1605.08634v1 [physics.pop-ph] for this version)
  https://doi.org/10.48550/arXiv.1605.08634
Journal reference: Australian Physics (2016), 53(3), 95-100

Submission history

From: Geraint F. Lewis Prof [view email]
[v1] Wed, 25 May 2016 07:13:06 UTC (296 KB)
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