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I 1 light year of mirror reflections?

  1. Sep 16, 2016 #1
    Just a thought...I know it is impossible, but.....
    What would you see in a mirror if you set up millions of mirrors, each reflected to the next mirror (each not too far apart), maybe in a spiral format, so that the total distance of reflections was one light year. The last mirror was angled to just reflect the open space.
    If you looked at the "1st" mirror and saw whatever was in front of the last mirror, would you be looking at a year back in time?
     
  2. jcsd
  3. Sep 16, 2016 #2
    On the same idea.... if we could create a "binocular" type device, but slow the light WAY down that passed through the device (so that it took 1 light year to go throught it), would you see 1 year into the past if you looked through it?
     
  4. Sep 20, 2016 #3

    CWatters

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    Yes. If the light takes a year to get to you then you see events that happened a year ago at the source. If you look at the moon you don't see the moon where it is "now". You see it where it was about 1.3 seconds ago because that's how long it took the light from the moon to get to you.
     
  5. Sep 20, 2016 #4

    CWatters

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    I have a similar device at home. With some limitations I can delay the light anything from a few seconds up to a decade or more. Even watch the same event more than once. The only problem is I have to set the machine up in advance of the event. I can't watch events that I haven't captured. It's storage capacity is also limited. I can only store a few hundred hours of events so I delete the less interesting ones every now and again :-) Its not binocular so I can't see past events in 3D either.
     
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