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Thread: Why are ray systems not so visible near the terminator?

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    Default Why are ray systems not so visible near the terminator?



    My daughter needs this answer for her Anstronomy GCSE coursework.
    Google didn't help on this occasion.
    Thanks in anticipation of your replies.
    Stuart Wright
    Founder of AVForums

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    Default Re: Why are ray systems not so visible near the terminator?

    Well, we don't answer homework questions for you.. but we can give hints.
    For a practical experiment, take a sheet of paper towel, scrunch it up into a ball, then open it up again.
    You now have a nice model of the uneven lunar surface.
    Now try lighting it with a torch (or the sun) straight on to the surface. See how even the colour is.
    Now try it shining the light at a angle to the surface. See what happens as you approach edge on (grazing along the surface).
    Then think what that's going to do to how obvious a slight colour difference on the surface is going to be.
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    Default Re: Why are ray systems not so visible near the terminator?

    Thanks, jerryTheC! I'm hoping to take my scope up to a summer camp and show kids and answer their questions, so I'm collecting good simple "lab" experiments.

    Judy

 

 

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