Carvalho, C. M.
Apolinario, F. R.
Total Authors: 4
 Univ Fed Sao Carlos, Rodovia Anhanguera, Km 174, BR-13604900 Araras, SP - Brazil
 Univ Fed Abc, Av Estados 5001, BR-09210170 Santo Andre, SP - Brazil
Total Affiliations: 2
European Journal of Physics;
Web of Science Citations:
We entertain the use of light-dependent resistors as a viable option as measuring sensors in optics laboratory experiments or classroom demonstrations. The main advantages of these devices are their essentially very low cost, easy handling and commercial availability, which can make them interesting for instructors with limited resources. Simple calibration procedures were developed indicating a precision of similar to 5% for illuminance measurements. Optical experiments were carried out as proof of feasibility for measurements of reflected and transmitted light and its quality results are presented. In particular, the sensor measurements allowed us to verify the angular distribution of a Lambertian reflective material, to observe transmitted and reflected specular light on a glass slab as function of the incoming angle of a light beam, and to estimate glass refractive index with values averaging 1.51 +/- 0.06 in satisfactory agreement with the expected 1.52 value. (AU)