Semicircular Glass Block, 90 x 18mm

This Eisco Labs Glass Semicircular Block measures 3.5" × 11/16" (90 × 18mm) with all faces fully polished. Made from clear glass, it works well in ray box experiments (PH0602A) and with low-power monochromatic light sources. Semicircular blocks are used for demonstrating refraction, total internal reflection, and critical angle in geometric optics experiments. The flat face acts as the refracting surface. Suitable for physics classrooms.