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    The Exploratorium
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    Discover how a refracting telescope works by making one from scratch using common items. This telescope won't have a tube so the learner can see how an image is formed inside the telescope....

    $10 - $20 per group Ages 14 - adult 45 to 60 minutes
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    Optical Society of America
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    In this optics activity, learners use a television to generate an image with a magnifying glass. Learners will be surprised to see how they can watch TV on a piece of paper, albeit upside down! Use...

    free Ages 6 - 11 Under 5 minutes
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    Community Science Workshop Network
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    In this activity, learners construct a device that projects images onto a surface, so they can trace landscapes and other sights. The cardboard box camera captures the images using a mirror, holder...

    $10 - $20 per student Ages 8 - 14 1 to 2 hours
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    The Exploratorium
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    Have you ever heard of a camera without a lens? In this activity, learners create a pinhole camera out of simple materials. They'll see the world in a whole new way: upside down and backwards!...

    $1 - $5 per student Ages 8 - 18 45 to 60 minutes
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    Science Friday
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    In this activity, learners examine how colored lenses act like filters and absorb all colors of light except for the color of the lenses. Learners explore this phenomenon by making a cool pair of...

    $5 - $10 per student Ages 8 - 14 10 to 30 minutes
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    Optical Society of America
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    In this optics activity, learners make a simple telescope using two lenses and a cardboard tube. Learners construct the telescope and then calculate its magnification. Use this activity to...

    $1 - $5 per student Ages 8 - 14 5 to 10 minutes
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    American Chemical Society
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    In this activity, learners explore ray optics. Learners discover that they can use a magnifying glass to create an upside-down image. <br> Safety note: Don't let the sun shine directly...

    $1 - $5 per group Ages 4 - 11 10 to 30 minutes
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    University of Washington
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    In this demonstration (18th on the page), learners conduct a simple test to explore how the cornea refracts light, which is further bent by the eye lens through a process known as accommodation....

    free Ages 8 - 18 Under 5 minutes
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    The Exploratorium
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    In this activity, learners use gelatin as a lens to investigate the properties of laser light. Learners can view total internal reflection of a beam of light and investigate angles of reflection...

    $5 - $10 per student Ages 8 - 18 5 to 10 minutes
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    The Exploratorium
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    Did you know that using a lens one can bend light to make pictures of the world? It's true! Using the lens from a disposable camera or a magnifying glass, learners will make a picture of a...

    $1 - $5 per student Ages 4 - 11 10 to 30 minutes

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