Reading Magnifier, 50mm, 12cm Focal Length Capacity_125mL Used to produce concentric Newton's

Used to produce concentric Newton's rings under monochromatic light

producing the nearly uniform field used to calibrate magnetic sensors and verify the Helmholtz geometry

SWG AWG Diameter (Inches) 18 16/17 0

Higher-output 65-watt soldering iron with a wooden bakelite handle

this air-cooled rheostat carries a slide-bar carriage on a vitreous-enameled tube for variable resistance under thermal load

Reading Magnifier, 50mm, 12cm Focal Length Capacity_125mL Used to produce concentric Newton'sChrome plated metal framed 50mm reading magnifier with a 12cm focal length, sized for fine print reading and convex lens image formation work in introductory optics.