Interchangeable Dial for Demonstration Meter, Model H Physics_Light & Optics sized to fit standard optical-bench

sized to fit standard optical-bench lamp houses and stocked together so a burned-out lamp does not stall an experiment

yellow) sit in 50 x 50mm mounts

Slim 75 x 12 x 5mm chrome-steel bar pair (2

Can withstand high temperatures and thermal shocks

showing how contact friction alone transmits rotation from one wheel to another in mechanical systems

Interchangeable Dial for Demonstration Meter, Model H Physics_Light & Optics sized to fit standard optical-benchFive hundred milliamp DC scale on a 315x115mm laminated panel with sealed shunt, sized to reconfigure the demonstration meter as a 0 500mA ammeter for general purpose student bench work.