Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
From: ken_fox@shhs1.ccsd.k12.co.us (ken fox)and I
To: phys-l@atlantis.cc.uwf.edu
Subject: Special Relativity Question / Barn Paradox
Date: Thursday, April 25, 1996 4:32 PM
I need your help again. Here is a paraphrase of a problem from the 1993
IB(higher level exam) that I am struggling with.
A super fast runner has a 4m pole ( her frame) and is moving at 0.866c
relative to me. I have set out two poles in my frame that are 2m apart
notice that her pole fits neatly between the two as she passes. Now,she
sees the two markers to be 1m apart.open
"Does she say that the pole will fit between the markers? Is there a
contradiction here? Explain."
I have run the RelLab simulation of the Barn where the doors close and
so that in my frame they are closed simultaneously ( a key concept hereI
think) when she is in the barn. In her frame the doors do not close atthe
same time but the front and back doors close and shut to allow the polethe
through. Does the runner say the pole fits? The runner sees the front of
pole at the front door long before she sees the back of the pole at theback
door.the
We had a great debate in class and most of us decided she ,too, thought
pole did fit but we are not all (including me) convinced. Can anyonehelp me
out?
thanks
ken fox