Light Dependent Resistance

A LDR is mounted on a plastic moulded case (90x90x42) mm approx. and connections are made via. 4mm sockets fitted just below the LDR. Students can investigate that how the LDR depends upon the light in different ways as intensity, distance, illumiting area etc. LDR is covered with a square frame opened at the top to vary the intensity of light on the LDR via. different sized aperture square frames. Total No. of eight frames with centre aperture (1-8) mm and one piece of unknown aperture are provided with the photo resistance.