# Thread: Question on Length Contraction...

1. Hi,

This seems obvious but, what's always talked about is how the stationary person measures a moving object and that moving object contracts in length. So there's a basketball on a passing ship. Stands to reason that if the stationary person, say on a planet, would see a flattened basket ball in that passing spaceship, that the spaceship would see an elongated (in the direction of travel) planet and person, no? Or have I got this all wrong?

I hope this question is in the correct forum.

Rusty

2.

3. No. Person om spaceship sees flattened planet. It is all relative.

4. Originally Posted by rrw4rusty
I hope this question is in the correct forum.

Rusty
It's really a physics question.

5. Originally Posted by rrw4rusty
Hi,

This seems obvious but, what's always talked about is how the stationary person measures a moving object and that moving object contracts in length. So there's a basketball on a passing ship. Stands to reason that if the stationary person, say on a planet, would see a flattened basket ball in that passing spaceship, that the spaceship would see an elongated (in the direction of travel) planet and person, no? Or have I got this all wrong?

I hope this question is in the correct forum.

Rusty
Any observer measuring an object that has a relative velocity with respect to himself will measure that object as being length contracted. The key word here is "relative", as it is meaningless to talk about which of them is "really" in motion.