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We entertain the use of light dependent resistors as a viable option asmeasuring sensors in optics laboratory experiments or classroom demonstrations.The main advantages of theses devices are essentially very low cost, easyhandling and commercial availability which can make them interesting forinstructors with limited resources. Simple calibration procedures weredeveloped indicating a precision of $\sim 5\% $ for illuminance measurements.Optical experiments were carried out as proof of feasibility for measurementsof reflected and transmitted light and its quality results are presented. Inparticular, the sensor measurements allowed to verify the angular distributionof a Lambertian reflective material, to observe transmitted and reflectedspecular light on a glass slab as function of the incoming angle of a lightbeam, and to estimate glass refractive index with values averaging$1.51\pm0.06$ in satisfactory agreement with the expected 1.52 value.

Measuring light with light dependent resistors: an easy approach for optics experiments