Can You Get a Cosmic Tan from Lights Across the Universe?

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Discussion Overview

The discussion explores the hypothetical scenario of traveling at high speeds across a universe illuminated by a line of bright lights, examining whether Doppler shifting could allow a person to receive a tan from these lights, which are typically used for home illumination.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • Some participants propose that Doppler shifting could indeed allow for tanning from the lights if one travels at sufficient speed.
  • One participant provides mathematical transformations for frequency and energy, suggesting a theoretical framework for understanding the effects of speed on light perception.
  • Another participant humorously agrees with the tanning possibility but warns about the risks of high speeds leading to exposure to X-ray or gamma radiation.

Areas of Agreement / Disagreement

Participants express differing views on the implications of high-speed travel and its effects on light exposure, with some agreeing on the potential for tanning while others introduce concerns about radiation exposure. The discussion remains unresolved regarding the practicalities and safety of such a scenario.

Contextual Notes

The discussion relies on assumptions about the nature of light and Doppler effects, and does not resolve the complexities of radiation types or the feasibility of such travel.

Aaron_Shaw
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Hi. If there were a whole line of bright lights strung from one side of the universe to the other, and i set off from one side to the other at sufficient speed, would the doppler shifiting mean that i could get a sun tan from the lamps that otherwise emit standard light that might be used to light a home?

Thanks.
 
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Aaron_Shaw said:
Hi. If there were a whole line of bright lights strung from one side of the universe to the other, and i set off from one side to the other at sufficient speed, would the doppler shifiting mean that i could get a sun tan from the lamps that otherwise emit standard light that might be used to light a home?

Thanks.

You know that:

Frequency transformation:
[tex]\nu'=\nu \sqrt{\frac{1+v/c}{1-v/c}}[/tex]
Energy transformation:

[tex]E'=E\sqrt{\frac{1+v/c}{1-v/c}}[/tex]
 
Aaron_Shaw said:
Hi. If there were a whole line of bright lights strung from one side of the universe to the other, and i set off from one side to the other at sufficient speed, would the doppler shifiting mean that i could get a sun tan from the lamps that otherwise emit standard light that might be used to light a home?

Thanks.

I would say "Yes". Let us know when you open your first tanning salon. :-)
 
Yes, but don't go too fast or else you'll get a dose of X-ray or gamma radiation.
 

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