2-Piece Adjustable Polarizing Filter Set for Optical Bench, 5 x 3.75" Item Type_Bug Viewer letting students measure rotational distance

letting students measure rotational distance against linear advance to derive the mechanical advantage of the spiral

Test tubes in borosilicate glass hold 25mL with inverse scale graduations for specialized measurement and chemistry procedures

Ratchet-stopped nickel-plated brass 25 mm micrometer screw gauge reading to 0

Convertible motor-generator running AC or DC in shunt or series wound configurations

110 ohms at one-percent tolerance

2-Piece Adjustable Polarizing Filter Set for Optical Bench, 5 x 3.75" Item Type_Bug Viewer letting students measure rotational distanceAdjustable polarization across two filters measuring 5 x 3. 75 x 1 inches each, dimensioned to drop into the PH0652 optical bench for hands on study of Malus's law and crossed polaroid extinction.