Optically Worked Double Convex Glass Lens, 75mm Diameter, 300mm Focal Length, Alternate Model Capacity_125mL " The kit's hydrophilic polymer

" The kit's hydrophilic polymer instantly absorbs water and expands to over 40 times its original volume

sized for student-bench stability during routine glassware assembly

Illustrates liquid-density changes with temperature using a weighted 75mm hollow copper sphere that floats in 15°C water and sinks as the water warms to 30°C

Autoclavable polypropylene draining basket measuring 40 by 40 by 11 cm

the cylindrical concave curvature spreading light along a single axis for line-focus and divergence demos

Optically Worked Double Convex Glass Lens, 75mm Diameter, 300mm Focal Length, Alternate Model Capacity_125mL " The kit's hydrophilic polymerAlternate model 75mm double convex glass lens at 300mm focal length, the optically worked surfaces and ground polished edges parallel to the main line 300mm focal lens for backup stock use.