Question:
An endoscope is employed by a physician to view the internal parts of a body organ. It is based on the principle of
An endoscope is employed by a physician to view the internal parts of a body organ. It is based on the principle of
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Optical fibers and endoscopes work on total internal reflection, where light remains trapped inside the fiber.
Updated On: May 7, 2026
- Refraction
- Reflection
- Dispersion
- Total internal reflection
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The Correct Option is D
Solution and Explanation
An endoscope is an optical instrument used by doctors to view internal organs of the body.
It uses optical fibers to transmit light.
Optical fibers work on the principle of total internal reflection.
When light travels inside an optical fiber, it repeatedly strikes the inner surface of the fiber.
If the angle of incidence is greater than the critical angle, light does not refract out.
Instead, it is reflected completely back inside the fiber.
This repeated complete reflection is called total internal reflection.
Due to this, light can travel through curved optical fibers with very little loss.
Therefore, an endoscope is based on:
\[
\text{Total internal reflection}.
\]
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