Distance light travels in a relatively moving frame?

  • Thread starter Reikoku
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  • #1
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I was wondering if say.. you have a particle moving at 0.5c in the +x direction and a lightbulb at relative rest to the particle.
The particle passes the lightbulb at t[itex]_{0}[/itex]
The lightbulb then flashes, the wave reaches the particle at a particular point, and the speed of light is then measured (by the particle) to be c. Does this then mean that the light wave will then travel a distance of ct from that point in the reference frame of the particle; t being any point in time that the particle wishes to measure the distance of the light wave from it.
 

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  • #2
Doc Al
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I was wondering if say.. you have a particle moving at 0.5c in the +x direction and a lightbulb at relative rest to the particle.
The particle passes the lightbulb at t[itex]_{0}[/itex]
If the particle and lightbulb are at relative rest, how can they pass each other?
 
  • #3
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If the particle and lightbulb are at relative rest, how can they pass each other?
Oh am I using the wrong terminology? I meant to say that the particle is moving with 0.5c compared to the lightbulb.
 
  • #4
Doc Al
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I meant to say that the particle is moving with 0.5c compared to the lightbulb.
OK.
Does this then mean that the light wave will then travel a distance of ct from that point in the reference frame of the particle; t being any point in time that the particle wishes to measure the distance of the light wave from it.
Yes.
 
  • #5
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Thanks Doc Al, that's helped clear up confusion.
 

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