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    American Physical Society
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    Learners shine the light of a laser pointer through sheets of fabric that all have a different number of threads per inch. By looking at the patterns created, learners calculate the wavelength of...

    $5 - $10 per group Ages 11 - 14 10 to 30 minutes
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    American Physical Society
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    In this activity on page 13 of the PDF, learners use a laser pointer (with known wavelength of light) to measure the thickness of a human hair. By shining the laser on a hair, analyzing the...

    $5 - $10 per group Ages 11 - 14 10 to 30 minutes

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