3B Scientific UE6020400-115 Experiment: Photoconductivity, 115 V

3B Scientific, UE6020400-115, Experiment for Solid State Physics: Photoconductivity, 115 V, 50/60 Hz

UE6020400-115 Includes Only:

• Optical Bench with metric mm and cm scales, 1000 mm
• Experimental Lamp, Halogen 12 V 15 W
• Optical Rider U, 75 mm - 6 pcs
• Adjustable Slit on Stem
• Convex Lens on Stem f =+150 mm
• Polarisation Filter on Stem - 2 pcs
• Holder for Plug-in Components
• DC Power Supply 20 V, 5 A (115 V, 50/60 Hz)
• Digital Multimeter P1035 - 2 pcs
• Pair of Safety Experiment Leads, 75 cm, blue, red - 3 pcs
• Transformer 12 V, 60 VA (115 V, 50/60 Hz)
• LDR 05 Photoresistor

Features:

• Objective: Record the characteristic curve for a photoresistor

Photoconductivity utilises absorption of light by means of the inherent photoelectric effect in a semiconductor to create electron-hole pairs. One specific semiconductor mix which exhibits the photoelectric effect particularly strongly is cadmium sulphide. This material is used in the construction of photoresistors. In this experiment, a CdS photoresistor is illuminated with white light from an incandescent bulb. The intensity of this illumination of the photoresistor is then varied by crossing two polarising filters placed one behind the other in the beam.