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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.

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.

In this activity, learners use a compact disc to make a spectrometer, an instrument used to measure properties of light.

In this four-part activity, learners explore light and sound through a variety of hands-on investigations.