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Astrophysics

  • one year ago

Could use a little help, relativity.

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  1. Astrophysics
    • one year ago
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    A rocket ship of proper length \(l_0\) travels at constant velocity \(v \) relative to a frame S. The nose of the ship \((A')\) passes the point \(A \) in S at \(t=t'=0\), and at this instant a light signal is sent from \(A'\) to \(B'\).

  2. Astrophysics
    • one year ago
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    Here's my figure |dw:1444376673186:dw| the time \[t' = \frac{ l_0 }{ c }\] for the sginal to reach the tail B' of the ship. My question is, at what time \(t_1\), as measured in S, does the signal reach the tail \(B'\) of the ship.

  3. Astrophysics
    • one year ago
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    |dw:1444376950407:dw|

  4. anonymous
    • one year ago
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    oh wait.. no sorry lolz

  5. Astrophysics
    • one year ago
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    Yeah, I sort of tried all of this already, I'm not quite sure at this point haha

  6. anonymous
    • one year ago
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    But its still fairly simple all you need to do is contact the length and then use classical physics to figure out the time taken..

  7. anonymous
    • one year ago
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    contract*

  8. Astrophysics
    • one year ago
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    \[\tau = \tau_0 \gamma\] I did try that oh..I think it's because this is the first question where I have the frames the other way around so my algebra must be wrong..

  9. Astrophysics
    • one year ago
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    \[l =\frac{ l_0 }{ \gamma }*\]

  10. Astrophysics
    • one year ago
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    Figured it out, thanks anyways @Mashy :)

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