Artec Educational LED light source device

This LED light source device is designed for educational purposes. Use it to demonstrate how light bends through a prism and many other experiments. Use it in combination with the two other primary colors (sold separately) red and blue for even more fun light experiments. The bottom of this device has a built in magnet so you can easily attach it to the white board for classroom demonstrations. A removable slit cap enables a thin beam of light or a thick light. Great educational tool for teaching about refraction, reflection, etc. Requires 2 AA batteries, included. Measures 4.5″ x 1.37″ x 0.75″.