Precision Resistor 20R

Allows students to conduct experiments to measure the speed of light. Reflect a laser off a movable mirror into a light receiver to measure phase differences.

Replacement torsion bands for the Gravitational Torsion Balance (AP-8215A).

Allows the students observation of velocity of drop rising in an electric field, then permits calculation of the force on the charge carried by the oil drop.

Set of four 4 oz bottles of mineral oil, for use with the Millikan Oil Drop Apparatus.