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Thread: Light Refraction View of the Past

  1. #1 Light Refraction View of the Past 
    New Member Veeshan's Avatar
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    Not even sure if refraction is the right word here but I was wondering if this could be true.

    The gravity waves from galaxies affects passing light, right? So imagine that one billion years ago light escaping from Earth's atmosphere broke free and sped off toward a distant galaxy. Now, this galaxy and it's neighbor are physically positioned in such a way as to bend the path of this light beam by 90 degrees each. This would turn the light beam back around and send it toward Earth.

    A billion years later, this light would hit the Hubble Telescope and be recorded. Would this not show us a video of Earth two billion years old? Or at least a living recreation of our solar system's birth?


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  3. #2  
    Forum Junior Cuete's Avatar
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    ¿Do you mean like a mirror?

    Earth's reflected light isn't that "strong", lots of information would be lost in the way. It would dissipate before getting with enough resolution to show anything, not enough to see anything.


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    Forum Radioactive Isotope mitchellmckain's Avatar
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    Cuete is quite correct. We get a lot of detail by collecting a lot of light over time which means that we can conceivably get detail on unchanging features if we collect light over long enough periods of time. So at best such a technique could only give us a view of earth's geological past and not much of its biological past.
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  5. #4  
    New Member Veeshan's Avatar
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    I considered that but I realized that not only would the Earth be shown, but so would the entire solar system. This could easily be useful.
    Give a man a fire and he's warm for a day, but set fire to him and he's warm for the rest of his life.
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