Does anyone know if the fastest velocity of light is not fastest anymore?

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    Light Velocity
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Discussion Overview

The discussion revolves around the question of whether the speed of light remains the ultimate speed limit in the universe, particularly in light of recent claims regarding neutrinos potentially traveling faster than light. Participants explore the implications of these claims, the validity of experimental results, and the ongoing debate surrounding the speed of light in the context of theoretical and experimental physics.

Discussion Character

  • Debate/contested
  • Experimental/applied

Main Points Raised

  • Some participants express confusion over recent claims that the speed of light may no longer be the fastest, seeking clarification on the validity of these claims.
  • One participant asserts that the speed of light, denoted as c, remains the limit for signaling, suggesting that the claims of faster-than-light neutrinos have not been proven.
  • Another participant references an error in the original experiment that suggested neutrinos were traveling faster than light, stating that subsequent tests confirmed neutrinos do not exceed this speed.
  • Contrarily, a different participant claims that after re-evaluating the equipment, neutrinos were still detected traveling faster than light, and this was corroborated by an independent group.
  • Further discussion includes a correction regarding the systematic error found in the original experiment, which led to the conclusion that neutrinos do not travel faster than light after all.

Areas of Agreement / Disagreement

Participants do not reach a consensus; multiple competing views remain regarding the speed of neutrinos and the validity of the experimental results. Some assert that neutrinos do not exceed the speed of light, while others maintain that initial findings indicated otherwise.

Contextual Notes

The discussion highlights limitations in the experimental setup and the interpretation of results, with unresolved questions about the accuracy of measurements and the implications for the speed of light as a universal constant.

louisgeorge
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Does anyone know if the fastest velocity of light is not fastest anymore? I think I heard a few days ago, that the light's velocity record has broken. Is it true? Will any of the teachers explain how did that happen, if it really did?
 
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louisgeorge said:
Does anyone know if the fastest velocity of light is not fastest anymore? I think I heard a few days ago, that the light's velocity record has broken. Is it true? Will any of the teachers explain how did that happen, if it really did?

This was not proven out. c is still the limit for signalling.
 


louisgeorge said:
Does anyone know if the fastest velocity of light is not fastest anymore? I think I heard a few days ago, that the light's velocity record has broken. Is it true? Will any of the teachers explain how did that happen, if it really did?

DrChinese is correct.

There was some error in the experiment. Neutrinos travel slower than the speed of light
 
ok ...DrChinese thank you so much :)
 
After checking the equipment another test was made and the results were still that the nutrinos were being detected before expected. (they did travel faster than light) it was also confirmed by an independent group.

Paul
 
PaulS1950 said:
After checking the equipment another test was made and the results were still that the nutrinos were being detected before expected. (they did travel faster than light) it was also confirmed by an independent group.

Paul
Eh, no. The original group did find a systematic error that most likely cased the earlier false results. When corrected for, the neutrinos turn out NOT to move faster than light. The other independent group also found normal not-faster-than-light speeds.
 

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