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Thread: Need help

  1. #1

    Default Need help

    Hello,
    My son is experimenting with light currently. He has a question which we couldn't sort out. So, is there anyone could help him to clear the idea? While making a pinhole project to see that light travels in straight line, if he uses two pinhole boards in front of light keeping in a distant, will the image be re-inverted? We tried but couldn't get any picture today. Thanks in advance.

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  3. #2

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    I asked DH (who did a lot of school experiments with light, including making holograms). His response was:

    I donít know for sure, but I think there are two problems.
    1. The first pinhole lets a tiny amount of light through. The second decreases that amount of light even more, so thereís hardly anything left.
    2. Pinholes donít act like lenses, so they donít have a focal point. So you canít put the second pinhole at or near the focal point (like would be done with lenses). No matter where you put the second pinhole, all it can ďseeĒ is a single point outside.
    I hope that helps, and I hope your DS is enjoying learning about light!
    Homeschooling DS13, DS6.

    Atheist.

    My spelling was fine, then my brain left me.

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