COMPUTER ARCHITECTURE
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Detailed explanation-1: -A photocell or photoresistor is a sensor that changes its resistance when light shines on it. The resistance generated varies depending on the light striking at his surface. A high intensity of light incident on the surface will cause a lower resistance, whereas a lower intensity of light will cause higher resistance.
Detailed explanation-2: -Vo = Vcc ( R / (R + Photocell) ) That is, the voltage is proportional to the inverse of the photocell resistance which is, in turn, inversely proportional to light levels.
Detailed explanation-3: -An Overview of Photocells Their main work is based on a phenomenon known as photo electric effect, in which a light sensitive material absorbs light energy or photons and emits an electron thus generating electricity. These are used in various electrical devices.