From the special theory of relativity, I understand that time is not absolute but relative according to the speed of observer. For instance, suppose there are two watches, one put inside a spaceship which rotates the earth and the other is just stationed on earth and both of them are synchronized firstly to have the same time reading. Let's consider now that the spaceship rotated the earth 100 times at half the speed of light and then stopped. Then, if we looked at the current time readings on both watches, they will be significantly different.(adsbygoogle = window.adsbygoogle || []).push({});

Is that also applied to distance? If there is a device in the spaceship which tells to those inside it how much distance (in km) the ship has been moving so far (like the one in the car), and after the ship was stopped, will the reading of the device be different (i.e. much less) than if we got the length of the spaceship's path around the earth and multiplied it by 100 (since there were 100 rotations)?

Thanks for your interest.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Is the distance relative also?

**Physics Forums | Science Articles, Homework Help, Discussion**