Multiple choice general knowledge

Endoscopy, a technique used to explore the stomach or other inner parts of the body, is based on the phenomenon of--

  1. total internal reflection

  2. diffraction

  3. reflection

  4. polarization
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A Correct answer
Explanation

Endoscopes use fiber optic cables that transmit light through total internal reflection, allowing doctors to see inside the body. Regular reflection would cause light to escape, while diffraction and polarization are unrelated principles.

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