Circular Perspex Block for Refraction Item Type_Cell Model Demonstrates composition and resolution of

Demonstrates composition and resolution of forces by attaching masses through pulleys on a force board

this 16 SWG bare copper wire ships on a 500g reel approximating 85 feet of high-conductivity material

Chrome-plated 50mm reading magnifier with a 10cm focal length

delivering wheel-driven power to a lamp or a Newton color disc

where current through a coil closes a separate contact and shows how a small signal controls a larger circuit

Circular Perspex Block for Refraction Item Type_Cell Model Demonstrates composition and resolution ofRound perspex refraction block, the curved face geometry letting beams enter along any radius for clean Snell's law angle work in ray box and refraction setups.