Round Convex Glass Mirror, 75mm Diameter, 100mm Focal Length Prong_2 Tensioned steel rod in a

Tensioned steel rod in a heavy iron frame breaks a brittle iron cross-rod as cooling contraction pulls it taut

Demonstrates the full light-to-electricity-to-motion chain through a solar cell

Bobbin-wound transformer coil with 4mm panel sockets

Meker-style natural gas burner delivers a broad

the strongly curved surface (R=100mm) producing magnified real images for image-formation experiments

Round Convex Glass Mirror, 75mm Diameter, 100mm Focal Length Prong_2 Tensioned steel rod in aWider aperture 75mm convex glass mirror at 100mm focal length, ~2. 8mm thick, the diverging curvature delivering reduced virtual images while the larger face brightens viewing.