Eisco Labs Hollow Acrylic Semi Circle for study of index of refraction (3 X 1.5 X 1.75 Inch)

Have your students use this handy device to measure observe the index of refraction for different materials. Half circle is made of acrylic with an indicator line half way across the arc. Typical uses for a device such as this are reflection, refraction, wave demonstrations, Snell's law, observational study. Dimensions are 3 inches long, 1.5 inches wide, 0.75 inches tall