Faster than light in a material medium?

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Discussion Overview

The discussion revolves around the possibility of particles, such as electrons, traveling faster than the speed of light in a material medium. It explores the implications of light's velocity change in different media and references phenomena like Cherenkov radiation.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • Some participants note that the velocity of light changes when it passes through a material medium and question whether particles can exceed this speed.
  • One participant mentions Cherenkov radiation as an example of charged particles moving faster than light in a medium.
  • References to experiments like AMANDA and ICE CUBE are suggested as relevant to the discussion of particles exceeding light speed in a medium.

Areas of Agreement / Disagreement

Participants express curiosity about the topic, with some providing resources and examples, but there is no consensus on the implications or interpretations of the phenomena discussed.

Contextual Notes

The discussion does not resolve the conditions under which particles may exceed light speed in a medium, nor does it clarify the definitions or assumptions related to light speed in different contexts.

Reshma
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Velocity of light changes when it passes through a material medium.

IS it possible for a particle(e. g. an electron) to travel faster than light in THAT medium? IF so, can someone give me some examples or experiments documenting this?
 
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Reshma said:
Velocity of light changes when it passes through a material medium.

IS it possible for a particle(e. g. an electron) to travel faster than light in THAT medium? IF so, can someone give me some examples or experiments documenting this?

That is how we get cerenkov radiation - when a charge particle is moving faster than light in that medium.

If you google on this, or on AMANDA or ICE CUBE (both are experiments being done, of have been done, on Antartica to detect cosmic neutrinos), you should be able to read on the exact experiments using such concepts.

Zz.
 
Thank you very much, jamesrc and Zz :smile:
 

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