Optically Worked Double Concave Glass Lens, 75mm Diameter, 300mm Focal Length Subcategory_Brushes the standard spectrometer integrates collimator

the standard spectrometer integrates collimator

Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

including beakers

5 inch specific gravity cylinder with a top hook for density and specific-heat work

Note: This item requires

Optically Worked Double Concave Glass Lens, 75mm Diameter, 300mm Focal Length Subcategory_Brushes the standard spectrometer integrates collimatorLong focal double concave glass lens at 75mm diameter and 300mm focal length, the moderate curvature spreading light gently for divergence and virtual image formation work in refraction demos.