Light waves with 0 amplitude due to extreme red shift?

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SUMMARY

The discussion centers on the theoretical possibility of light waves experiencing a redshift to the point where their amplitude reaches zero. Participants assert that while redshift affects frequency, it does not directly correlate with amplitude. Specifically, an infinite redshift factor is deemed unphysical. The conversation highlights that with each factor of 10 expansion in space, the energy density decreases significantly, leading to a proportional decrease in amplitude, but it will never reach zero.

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  • Understanding of redshift and its implications in physics
  • Basic knowledge of wave amplitude and frequency relationships
  • Familiarity with energy density concepts in cosmology
  • Mathematical principles related to infinite limits and physical constraints
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  • Research the concept of redshift in cosmology and its mathematical implications
  • Explore the relationship between energy density and wave amplitude in physics
  • Study the effects of space expansion on light properties using general relativity
  • Investigate the concept of infinite limits in mathematical physics
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Physicists, cosmologists, and students interested in the properties of light and the effects of cosmic expansion on wave behavior.

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Is it theoretically/mathematically possible for light waves to be red-shifted so much that it's amplitude is equal to zero?
 
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The shift in frequency is unrelated to the amplitude of the wave as far as I know.
 
You would need an infinite redshift factor which is unphysical.
If space expands by a factor of 10, the energy density goes down by a factor of 10000, so your amplitude goes down by a factor of 100.
If space expands by another factor of 10, the energy density goes down by another factor of 10000, so your amplitude goes down by another factor of 100.
...
It will never be zero.
 

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