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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.

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

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.