Brass Ring and Ball for Thermal Expansion Demonstration Lab Supplies_Clips the f/4 curvature stretching the

the f/4 curvature stretching the focal throw for projection-style image formation and reflector telescope analogues

Pairs 75 by 50mm with 18mm thickness on an acrylic rectangular refraction block

with AC and DC both available on separate terminals for electronics builds

the bulky triangular geometry handling wider beams for total internal reflection

this empty 4mm-terminal holder accepts user-supplied parts where pre-wired modules don't cover the experiment

Brass Ring and Ball for Thermal Expansion Demonstration Lab Supplies_Clips the f/4 curvature stretching theBuilt for the classic thermal expansion demonstration, this brass ball and ring fit freely at room temperature and stick tight once the ball is heated and expanded.