Keep my session open?
Ending In 
The session is expired
Your session has expired. For your security, we have logged you out.
Would you like to log in again?


This apparatus is used to study the current Vs voltage characteristics of CdS photo-resistor at constant irradiance and to measure the photo-current.

Salient features:
Adjustable slit self centering.
Marked analyzer and polarizer for angle measurement.

Principle and Working:
Absorption of light increases electrical conductivity in a solid. In case of cadmium sulphide (CdS) photoresistor, when it is exposed to light the transition of activator electrons into the conduction band and charge exchange of traps with holes being created in the valence band causing enhancement of conductivity. In the present setup, photo current is studied as a function of the voltage applied to the photo resistor at a constant irradiance. The angle of polarization is changed by polarizer filter.

Photoresistor in holder (CdS)
Lamp housing
Convex lens in holder
Polarizer/Analyzer (pair)
Optical Bench
Adjustable slit self centering
Digital multimeter
Flexible plug lead, 50 cm (Red) 2
Flexible plug lead, 1 m (Black)

Required but not included: Power supply 12V AC/DC 5 Amp. 1 and Regulated Power Supply, 0-16V DC, 5A.



Item # Description Unit Availability Price Quantity
470163-952 Photoconductivity
Each Retrieving


Need help?

  • Whatever you have to say, positive or negative, is important to us.
  • Providing feedback takes only seconds.
  • Your feedback will be made available to the public on the web. will publish your name as user.
You can use this name, or edit and save a nickname.
We recommend authors use their first and last initial.

Please confirm your profession

Example: Education

Please confirm your role

Example: Teacher

Please confirm your location

Example: New York, NY


Total Ratings: 0
Avg. Ratings: 0.0 out of 5

Sort all by:

Review & Compare Alternatives
We found alternative products that can save you up to  per item-unit.  To compare product details, select up to 3 alternatives below and click Compare Selected. To add items to your basket, enter a quantity and click Add to Basket.

Original Product:

Description Catalog Number Availability Unit Your Price Price Per Qty