For optical detection, we use

Options :
  1. Diode laser
  2. LED
  3. LASER
  4. photodiode


Answer and Explanation :-

Answer: Option 4

Explanation:

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To recognize our bias toward error should teach us modesty and reflection, and to forgive it should help us avoid the inhumanity of thinking we ourselves are not as fallible as those who, in any instance, seem most at fault. Science can give us knowledge, but it cannot give us wisdom. Nor can religion, until it puts aside nonsense and distraction and becomes itself again.
-Marilynne Robinson