Multiple choice general knowledge

Endoscopy, a technique used to explore the stomach orother inner parts of the body, is based on the phenomenon of......

  1. Total internal reflection

  2. Interference

  3. Diffraction

  4. Polarisation
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A Correct answer
Explanation

Endoscopy uses fiber optic cables that rely on total internal reflection to transmit light through flexible tubes. Light repeatedly reflects internally along the fiber wall, allowing visualization of internal body structures. Interference, diffraction, and polarization are unrelated optical phenomena.

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