Optically Worked Double Concave Glass Lens, 50mm Diameter Focal Length:100mm providing a fixed sighting reference

providing a fixed sighting reference for telescope and spectrometer alignment on the optical bench

sized for the student electrolyzer to study electroplating

and crime scene) Blood typing trays (1) set ABO/Rh blood typing antiserums (1) package mixing sticks Teacher's manual Student study guide copymasters Safety data sheet (SDS) packet

Range: 0 to 20 mg/L

Optically Worked Double Concave Glass Lens, 50mm Diameter Focal Length:100mm providing a fixed sighting referenceSpherical optically worked glass lens with ground edges demonstrates how diverging lenses always produce smaller virtual upright images for ray tracing exercises.