Photoconductivity, Multipurpose power supply. Electrical safety tested. Marked analyzer & polarizer for angle measurement. Photo current is studied as a function of the voltage applied to the photo resistor at a constant irradiance.
Youngs Modulus of Wires Apparatus, Frame made of cast iron, Searle s Pattern. Complete with ceiling bracket having two self-centering chucks and tension weight.Searle s Pattern.