Electrical Whirl, 95mm 3-Point Star Subcategory_Centrifuges Optically-worked glass double convex lens

Optically-worked glass double convex lens with a 150mm focal length and 1

where colored liquid in a U-shaped section shifts measurably as air blown through a constricted glass tube creates pressure differences

Steel keepers across the 50 x 12 x 8mm Alnico bar pair preserve field strength in storage between lessons

Designed to project wave behavior live for an entire class

Electrical Whirl, 95mm 3-Point Star Subcategory_Centrifuges Optically-worked glass double convex lensPointed three arm metal star on a 4mm socket pivot, set in motion by ion wind from corona discharge whenever the apparatus is connected to a high voltage source.