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The device which is used for detecting light intensity is

The device which is used for detecting light intensity is Correct Answer Photodiode

The device which is used for detecting light intensity is Photodiode.

Photodiode:

The symbol of a photodiode is as shown:

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  • Photodiode is a type of PN junction that generates current when exposed to light.
  • It operates in reverse biased mode and converts light energy into electrical energy and is also known as a photodetector or a photosensor.
  • Only minority current flows through the device when the certain reverse potential is applied to it.
  • The operating principle of the photodiode is such that when the reverse-biased junction is exposed to light, an electric current starts to flow through it. This is as shown:

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Comparison between LED TV and LCD TV

LED TV

LCD TV

LED: Light-emitting diode

LCD: Liquid crystal display

It is pn junction device

LCD is an optical device

LED TV uses LEDs backlight

LCD TV use fluorescent backlight

Better picture quality

Not up to the level

Thinner than LCD TV

Thicker in size

Very costly

Less costly

More power required

Less Power required

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