Concave Glass Mirror, 75mm Diameter, 200mm Focal Length Ag Mechanics paired with electroscopes and pith

paired with electroscopes and pith balls in classic electrostatic-charging investigations

providing repeatable timing for physics classroom demonstrations and student laboratory experiments without power

Demonstrates the polarity-sensitive forward-bias behavior of a light-emitting diode on a base with two 4mm terminals

and chamber walls at a scale visible for group demonstrations

Concave Glass Mirror, 75mm Diameter, 200mm Focal Length Ag Mechanics paired with electroscopes and pithWider aperture concave glass mirror at 75mm with 200mm focal length, ~3mm thick, the f 2. 7 ratio brightening real image projection setups in image formation experiments.