Hollow Glass Prism with Stopper, 2 x 2" Light & Optics_Color sized for fine-print reading and

sized for fine-print reading and convex-lens image-formation work in introductory optics

Ten-microfarad electrolytic capacitor in an ABS module with 4mm sockets

designed for classroom identification drills and examination preparation

photo displays

5V motor-generator on a 6 by 4 by 2-inch base with 4mm socket terminals and a 15mm V-pulley

Hollow Glass Prism with Stopper, 2 x 2" Light & Optics_Color sized for fine-print reading andBuilt for medium volume Snell's law work, a 2 by 2 inch hollow glass prism with stopper holds more liquid than the 1. 5 inch sibling for refraction index investigations across multiple media.