Originally Posted by **Deco** I'm not understanding how this is a contradiction? |

It isn't. I think the author of the book is suggesting a way someone may misinterpret Lorentz contraction. I don't follow what he's saying though. Perhaps because I know relativity.

Originally Posted by **Deco** |

When talking about Lorentz contraction you have to be very careful to specify in what frame the object is at rest and in what frame the object is moving. I guess the problem is inquiring about a particular misinterpretation.

If you're interested in the relativity I've created my own tutorials on these derivations. You might enjoy working through them.

Try following the proof of the expression for time dilation here

Light Clock
After you have the expression for time dilation worked out you can follow the proof for Lorentz contraction. There are two that you might want to follow.

Lorentz Contraction Lorentz Contraction – Version 2
I'm always looking for feedback on my web pages so if you read them let me know what you think. Thanks.

Pete