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In this activity, learners use an old CD to construct a spectroscope, a device that separates light into its component colors.

Learners demonstrate how water can distort, refract and magnify light.

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

In this activity related to nanotechnology, learners observe some of the effects that result from creating a thin layer of material several nanometers thick.

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

In this activity, learners mix several sugar solutions to investigate the property of density. Each sugar solution has a different density and color of the rainbow.

In this activity, learners create a "mini sky" in a glass of water in a dark room.

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

Learners conduct two activities to investigate two properties of liquids: density and viscosity. In a clear container, learners stack 7 different liquids which will layer according to their density.

In this activity, learners trap a thin layer of air between two pieces of Plexiglas to produce rainbow-colored interference patterns.

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.

In this optics activity, learners split white light into all its component colors using three household items: a compact disc, dishwashing liquid, and a hose (outside).

In this optics activity, learners explore color by examining color dots through colored water and the light of a flashlight.