Double Concave Acrylic Lens, 86mm, 20cm Focal Length Glassware used for spring-constant and elastic-deformation

used for spring-constant and elastic-deformation work

matching the geometry of companion copper and iron rods for controlled thermal-conductivity comparisons

Designed to measure Planck's constant through the photoelectric effect

letting students snap cord directly into place for faster classroom setup and teardown

Can withstand high temperatures and thermal shocks

Double Concave Acrylic Lens, 86mm, 20cm Focal Length Glassware used for spring-constant and elastic-deformationAcrylic double concave lens at 86mm length and 20cm diverging focal length, the lightweight body producing virtual upright reduced images for safer per desk divergence demonstrations.