Narrow-Angle Glass Prism, 15° x 82.5° x 82.5° Item Type_Dissection Equipment letting students compare four densities

letting students compare four densities by mass alone while the volume is held constant across the set

Bobbin-wound coil for the demountable transformer with panel-mount 4mm sockets and an enclosed earth connection

Pair of nylon-fringed metal pompons on insulated stands that fan into wide cones under mutual repulsion when charged

the diverging curvature softening divergence for subtler virtual-image reduction in optics work

Narrow-Angle Glass Prism, 15° x 82.5° x 82.5° Item Type_Dissection Equipment letting students compare four densitiesMid narrow 15 x 82. 5 x 82. 5 glass wedge prism, the apex doubling the deviation of the 5 wedge while staying within the small angle approximation regime.