Glass Block With Two Frosted Sides, 114 mm X 63 mm X 19 mm, 1 Each

The Glass Block With Two Frosted Sides by United Scientific is a rectangular glass block measuring 114 mm x 63 mm x 19 mm, with two sides frosted. Students trace rays through its parallel faces to measure refraction, lateral displacement and the refractive index of glass. Physics teachers use it with pins and paper or a ray box in introductory optics practicals.