US$ 23.00
walls revealing fluid levels behind the depth-dependent pressure jets
Compact metal-box convection demonstrator at 10 by 4 by 3 inches with two glass chimneys
Ten-pack of 5mm green through-hole LEDs
students filling the cavity with water or other liquids to study Snell's law and refraction-index variation by medium
Optically Worked Double Concave Glass Lens, 75mm Diameter, 150mm Focal Length Gifts walls revealing fluid levels behindOptically worked double concave glass lens at 75mm diameter and 150mm focal length, the diverging curvature producing virtual upright images for refraction and beam spreading work.
US$ 23.00
US$ 132.50
US$ 250.00
US$ 279.60
US$ 159.60