• Corpus ID: 32609762

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

@article{Lewis2016OnTR,
  title={On The Relativity of Redshifts: Does Space Really "Expand"?},
  author={Geraint F. Lewis},
  journal={arXiv: Popular Physics},
  year={2016}
}
  • 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… 

Figures from this paper

On cosmological expansion and local physics

We find an exact convergence in the local dynamics described by two supposedly antagonistic approaches applied at the local, solar system scale: one starting from an expanding universe perspective

References

SHOWING 1-5 OF 5 REFERENCES

Expanding Space: the Root of all Evil?

Abstract While it remains the staple of virtually all cosmological teaching, the concept of expanding space in explaining the increasing separation of galaxies has recently come under fire as a

Joining the Hubble flow: implications for expanding space

The concept of expanding space has come under fire recently as being inadequate and even misleading in describing the motion of test particles in the universe. Previous investigations have suffered

Spectral shifts in general relativity

A unified approach towards spectral shifts in general relativity brings the cosmological and gravitational redshifts within the same framework as the more familiar Doppler effect. This approach was

A diatribe on expanding space

Some comments are made on the usefulness or otherwise of the concept of `expanding space' in cosmology. These notes are an expanded version of material first published in 2001 but not previously