Description

Clear acrylic plastic block 20mm thick with bottom surface finished in white to slow rays tracks and all other surfaces fully polished.

The set comprises seven blocks as follows:

(a) rectangle 70x50mm

(b) triangle 90x45x45, 75mm hypotenuse.

(c) triangle 60x60x60, 57mm side

(d) semi-circle 75mm diameter

(e) bi-convex 75mm long, curved faces, 115mm radius

(f) bi-convex 75mm long, curved faces, 145mm radius