Product Code: JLA_6_4_252

Authors:
Lewis R. Smith
Science Department, Leigh High School, San Jose, CA, U.S.A.

Many simple concepts that we introduce in optics could lead to laboratory work if we had access to photodetectors that could give a quick voltage or current response proportional to the light intensity. The device described here is easily constructed from readily available parts at a cost of about $2.00 and can be used with any light source and any conventional voltmeter.