The diode used for the detection of visible and in visible light is:
Correct answer: A. Photodiode
- A. Photodiode
- B. Photo voltaic cell
- C. Light emitting
- D. All of above
Explanation
A photodiode is a semiconductor device that is used to detect light. In order to detect light, a photodiode is exposed to a photon of light and it generates a potential difference upon exposure. It also changes its electrical resistance when it comes into contact with a beam of light
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A p-n junction forms when p-type and n-type semiconductor regions meet, creating a depletion layer, barrier potential and rectifying action. The work covers forward and reverse bias, junction current, diode characteristics, and how a diode converts alternating current into pulsating direct current through half-wave and full-wave rectification.
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