Hollow Acrylic Semi-Circle for Refraction Index Study, 3 x 1.5 x 1.75" Health & Genetics_Equipment & Supplies providing the longer-reach branched-wiring counterpart

providing the longer-reach branched-wiring counterpart to the 300mm version

Cross wires set inside a 10mm aperture on a 75mm circular black metal screen

Three-part medical-quality human skull model with a removable calvarium and articulated mandible

In line membrane filter (0

holding a 20mm candle steady for thermal-expansion

Hollow Acrylic Semi-Circle for Refraction Index Study, 3 x 1.5 x 1.75" Health & Genetics_Equipment & Supplies providing the longer-reach branched-wiring counterpartAcrylic semi circular block measuring 3 x 1. 5 x 1. 75 inches with a center indicator line, used to study Snell's law, total internal reflection, and critical angle behavior.