Acrylic block (115mm x 65mm x 20mm)

Acrylic block (115mm x 65mm x 20mm) is used to show refraction and total internal reflection. Acrylic (plastic) is less likely to break but easier to get scratches. The refractive index of acrylic is about 1.49.

Acrylic block is normally used with reinforced cork board or 3 beam ray box.