Question:
The device that can detect optical signals is
The device that can detect optical signals is
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Photo diodes are specifically used for detecting light signals, making them ideal for optical signal detection.
Updated On: May 15, 2025
- Zener diode
- Photo diode
- Light emitting diode
- Transistor
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The Correct Option is B
Solution and Explanation
A photodiode is specifically designed to detect light (optical signals). When photons hit the photodiode, they generate electron-hole pairs, creating a photocurrent proportional to the intensity of the light. Zener diodes are used for voltage regulation, and light-emitting diodes (LEDs) emit light when current flows through them. Transistors are used for amplification and switching, not for detecting light.
Thus, the correct answer is \( \boxed{\text{Photo diode}} \).
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