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Learners are challenged to discover the relative densities of colored liquids to create a rainbow pattern in a test tube.

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

In this activity (posted on March 14, 2011), learners follow the steps to construct a camera projector to explore lenses and refraction.

In this optics activity, learners discover that not all shadows are black. Learners explore human color perception by using colored lights to make additive color mixtures.