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valina [46]
3 years ago
9

Current flows in a light detection device when _____ collide with its pn junction.

Physics
1 answer:
inysia [295]3 years ago
7 0
The light detection device is also called photodetector. It <span>transforms any natural or artificial light source it encounters into sound.
</span>Current flows in a light detection device when light collide with its pn junction.
When light falls on the junction, a reverse current flows which is proportional to the illuminance. The linear response to light makes it an element in useful photodetectors<span> for some applications. It is also used as the active element in light-activated switches.</span>
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