Nakamura Achromatic Glass Prism, (pair)

This set of 2 prisms (20 and 40 degree angles) is used to demonstrate dispersion, to show that white light is actually a mixture of colored lights, and to demonstrate the materials with different indices of refraction can be employed to virtually eliminate chromatic aberration. The prisms disperse a beam of light into its constituent colors. When combined, the second prism counteracts the dispersion caused by the first. These prisms are excellent instruments for students.