A photo diode consists of a p - n junction coated with translucant film . The light (radiation) is allowed to fall upon its surface, across the junction. The junction is made reverse - biased with an e.m.f source. A reverse current flows nearly linearly with the intensity of more...
The photo voltic cells generate electrical energy when exposed to light and does not require any external power. These are in commercial use as exposure meters, direct reading illumination meters and as electrical power sources in form of solar cells. The present set is bmore...
MEASUREMENT OF LIGHT USING L.D.R. A photo resistor consists of a device that change its electrical Ohmic resistance when light is applied. Thus it is also called as photo conductive cell or the Light Dependent Resistor abb. L.D.R. The active region of photo resistor is a more...
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