Re: This is confusing - can someone explain?
- From: "N:dlzc D:aol T:com \(dlzc\)" <dlzc@xxxxxxx>
- Date: Wed, 25 Apr 2007 18:00:23 -0700
Dear hjsb85:
<hjsb85@xxxxxxxxx> wrote in message
news:1177546395.153457.128530@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I read (and learned in school) about time dilation and
the twins paradox - that is if you have one twin stay
on Earth and the other fly in a spaceship at relativistic
speeds, the one on Earth will be older when the
spacebound twin returns. Did I get that right?
You remembered it correctly.
Now, can it be said that the Earth and the Universe
itself is moving at relativistic speeds in relation to
the ship?
Yes. The very heart of relativity. You cannot tell by local
measurements which twin is "really" moving inertially.
If so, which twin will get older?
The one that accelerates. The "stay at home" twin does not
accelerate.
David A. Smith
.
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