Thermal Conductivity Star Chemistry Diffraction grating mounted on a

Diffraction grating mounted on a 90 x 40mm card slide

Demonstrates that charge resides only on the outer surface of a conductor by inverting the charged net inside out and showing the charge transferring to the new outside layer

5% ±2 digit accuracy on a 3-1/2 digit LCD

deliberately using non-standard graduations to build empirical reasoning

dimensioned to hold a pair of 150mm (6-inch) bar magnets safely apart from other steel apparatus while preserving the polar alignment of each

Thermal Conductivity Star Chemistry Diffraction grating mounted on aFour metal conductivity star with copper, brass, aluminum, and iron rods radiating from a central heated disc, letting students see conduction rate differences in one view.