For detecting light intensity,we use:

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Question

(A) The device used for detecting light intensity is a $Photodiode$. $A$ $Photodiode$ is a special type of $PN$ junction diode that generates current

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photodiode in reverse bias.

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(A) The device used for detecting light intensity is a $Photodiode$. $A$ $Photodiode$ is a special type of $PN$ junction diode that generates current when exposed to light. It is specifically designed to operate in reverse biased mode. When light falls on the junction,it creates electron-hole pairs,and the reverse current increases with the intensity of the incident light. Therefore,it acts as a photodetector or photosensor.

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