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In this activity (posted on March 12, 2011), learners follow the steps to construct a spectroscope, a tool used to analyze light and color.

Learners experiment to see which colors of light will cause a phosphorescent (glow-in-the-dark) material to glow.

This paper describes a working-model demonstration of Ernest Rutherford's 1911 experiment about the nature of atoms.

With a laser pointer and some household items, learners can create their own laser light show. They can explore diffuse reflection, refraction and diffraction.