Why do you need two mirrors? You could put just one mirror at a distance of 30 light-seconds away and then watch yourself as you were one minute earlier. You'd need one powerful telescope to resolve anything though. But you could easily prove that it worked by comparing the image of your clock in the mirror to what it says when you look at it directly.baker27marine said:Let's say theoretically we can setup a perfect environment with two mirrors at a great distance apart. The distance is great enough to allow light to reflect off one mirror and not reach the other mirror until a full minute has elapsed. Could this in "theory" create a window to see one minute into the past?
Yes, using the definition of simultaneity that the stars we see in the sky are as they were thousands of years ago, we can look up in the sky and see them as they were thousands of years ago. There is no independent proof like there is in my previous post.Vorde said:Sure, but using this definition it's much easier to see into the past. Just look up at the stars and you're seeing them as they were thousands upon thousands of years ago.