Question

Photo diodes are used to detect
(a) radio waves
(c) IR rays
(b)
(d)
gamma rays
optical signals​

Answer 1

Answer:

IR rays

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Answer 2

Photodiodes are used to detect Optical Signal.

Option(d).

Explanation:

• Photodiodes is a kind of light detector, it can able to convert the light energy into the current.

• It contains the optical filters, lenses and all.

• It is used to detect optical signals with a change in intensity of light if a reverse bias voltage is applied.

• When the photodiode is reverse biased, the current is defined as the sum of the leakage current and the photocurrent and the capacitance is lower than forward bias.

• This circuit may serves to amplify the current.

• Photodiode is a semiconductor so it is used to detect

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