| Topic: |
Science > Physics |
| User: |
"Nishu" |
| Date: |
26 Apr 2006 04:09:24 AM |
| Object: |
A relativity paradox |
Im very new to relativity and have just started. Maybe you can explain
the right concept.
Suppose a train of length 300m(at rest) wishes to pass through a tunnel
of length 250m(as seen from ground).The opposite end of tunnel is
blocked. Speed of the train is 0.8c. There are hijackers at the front
end of tunnel. For them the train apprears to be of length 180m and
feel that they can easily trap the train inside the tunnel. But The
passengers in the train sees that tunnel is of length 150 m which is
insufficient for tunnel to trap them.
Will the hijjackers succeed? If not, what will happen.
And yes, I believe that it's the spacetiime that contracts about the
frame of refrence and not the objects itself, unless they are not in
other frame? I'm I right? If not please correct me.
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| User: "Sam Wormley" |
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| Title: Re: A relativity paradox |
26 Apr 2006 08:52:25 AM |
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Nishu wrote:
Im very new to relativity and have just started. Maybe you can explain
the right concept.
Suppose a train of length 300m(at rest) wishes to pass through a tunnel
of length 250m(as seen from ground).The opposite end of tunnel is
blocked. Speed of the train is 0.8c. There are hijackers at the front
end of tunnel. For them the train apprears to be of length 180m and
feel that they can easily trap the train inside the tunnel. But The
passengers in the train sees that tunnel is of length 150 m which is
insufficient for tunnel to trap them.
Will the hijjackers succeed? If not, what will happen.
And yes, I believe that it's the spacetiime that contracts about the
frame of refrence and not the objects itself, unless they are not in
other frame? I'm I right? If not please correct me.
Phsyics FAQ: A Special Relativity Paradox: The Barn and the Pole
http://hermes.physics.adelaide.edu.au/~dkoks/Faq/Relativity/SR/barn_pole.html
Are There Any Good Books on Relativity Theory?
http://math.ucr.edu/home/baez/physics/Administrivia/rel_booklist.html
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| User: "" |
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| Title: Re: A relativity paradox |
26 Apr 2006 10:19:37 AM |
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Nishu wrote:
Im very new to relativity and have just started. Maybe you can explain
the right concept.
Suppose a train of length 300m(at rest) wishes to pass through a tunnel
of length 250m(as seen from ground).The opposite end of tunnel is
blocked. Speed of the train is 0.8c. There are hijackers at the front
end of tunnel. For them the train apprears to be of length 180m and
feel that they can easily trap the train inside the tunnel. But The
passengers in the train sees that tunnel is of length 150 m which is
insufficient for tunnel to trap them.
Will the hijjackers succeed? If not, what will happen.
And yes, I believe that it's the spacetiime that contracts about the
frame of refrence and not the objects itself, unless they are not in
other frame? I'm I right? If not please correct me.
Simultaneity is relative. They will not close at the same time, but
rather, the first part of the tunnel will close, then the second part
of the tunnel will close.
http://math.ucr.edu/home/baez/physics/Relativity/SR/barn_pole.html
-Matthew Paul Finnigan-
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| User: "Nishu" |
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| Title: Re: A relativity paradox |
26 Apr 2006 12:52:55 PM |
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Thanks
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| User: "" |
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| Title: Re: A relativity paradox |
26 Apr 2006 06:03:01 AM |
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m very new to relativity and have just started. Maybe you can explain
the right concept.
Suppose a train of length 300m(at r.....
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How many questions can be asked?
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