Originally Posted by hush36

Probably another dumb question but learning is fun so...

Imagine a centrifuge (like those used but the apollo astronauts) that can rotate at light speed. There is a cockpit at the end of the rotating arm that has a inwards facing window in it (so the person riding the centrifuge can see the "origin" or center of the circle made by the centrifuge)

A light is positioned in the middle of the centrifuge (at the origin) and is programmed to change color every second (lets say from red to orange to green and back to orange and then back to red).

This light is in syncrony with another light inside the cockpit that also changes color every second.

A second person stands at the origin so he can see both lights change color.

The centrifuge starts to spin and gradually approaches light speed.

What does each person see (i.e. the one riding the centrifuge and the one at the origin) as light speed is reached ?

I hope I've explained this clearly enough for an answer.

Thanks