A medical instrument called "Endoscope" works on the principle of .................

Correct option is C

 The medical instrument "Endoscope" works on the principle of Total Internal Reflection (TIR). TIR occurs when light travels from a denser medium to a rarer medium with an incidence angle greater than the critical angle, causing it to reflect entirely within the medium. In endoscopy, light is directed through flexible optical fibers, which allows the light to internally reflect, providing visibility into body cavities. This technique enables doctors to observe organs and tissues with minimal invasiveness.
Important Key Points:
1. Endoscopes use TIR in optical fibers to transmit images.
2. TIR is critical for capturing clear internal visuals.
3. Endoscopy is commonly used in gastrointestinal, respiratory, and urinary diagnoses.
4. TIR allows light to reflect without loss, enhancing image quality.
5. Endoscopes are flexible, allowing access to various body parts.
6. Minimal patient discomfort and faster recovery are benefits of endoscopy.
Knowledge Booster:
· Reflection is the bouncing back of light from a surface, not sufficient for endoscopy.
· Refraction occurs when light changes direction passing from one medium to another but doesn't keep the light confined within fibers.
· Scattering refers to the dispersion of light, which would reduce image clarity, thus ineffective in endoscopes.