What is photodiode how is it used to measure light intensity?
Answers
A change in the photo current indicates a change in the light intensity, if a reverse bias is applied. Thus photo diode can be used as a photo detector to detect optical signals.
Answer:
It is a semiconductor diode that changes its electrical resistance or creates a potential difference when exposed to light.
Explanation:
A photodiode's packaging allows light, infrared, ultraviolet, or X-ray radiation to reach the sensitive area of the device. As the surface area of the photodiode rises, the response time often decreases. Photodiodes are made to function in reverse bias.
In scientific and industrial instruments, photodiodes are used to measure light intensity, either in and of itself or as a proxy for another attribute. Data encoded on an infrared beam, as in home remote controls, can be received by a photodiode. In order to transmit signals across circuits without a direct metallic connection, photodiodes can be utilised to create an optocoupler.
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