• Corpus ID: 32609762

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

  title={On The Relativity of Redshifts: Does Space Really "Expand"?},
  author={Geraint F. Lewis},
  journal={arXiv: Popular Physics},
  • G. Lewis
  • Published 25 May 2016
  • Physics, Art
  • arXiv: Popular Physics
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… 

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