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MDCAT
Physics
2018

Physics · Optics, Nature of Light and Optical Instruments

Work through this past-paper style MCQ, then read the full explanation. Practice more physics questions on mMCQ with adaptive practice and topic analytics.

Question
What is the main feature required by the optical fiber for the propagation of light in an optical fiber?
Options
  • A
    Optical glass should be cleaned
  • B
    Light should be totally confined within the fiber
  • C
    They are cheaper than copper wire
  • D
    LED light must be used
Explanation

Optical fibers typically include a core surrounded by a transparent cladding material with a lower index of refraction. Light is kept in the core by the phenomenon of total internal reflection which causes the fiber to act as a waveguide. To ensure proper transmission light should be confined within the fiber.

Optical fibers typically include a core surrounded by a transparent cladding material with a lower index of refraction. Light is kept in the core by the phenomenon of total internal reflection which causes the fiber to act as a waveguide. To ensure proper transmission light should be confined within the fibre.

Optical fibers typically include a core surrounded by a transparent cladding material with a lower index of refraction. Light is kept in the core by the phenomenon of total internal reflection which causes the fiber to act as a waveguide. To ensure proper transmission light should be confined within the fibre.

Optical fibers typically include a core surrounded by a transparent cladding material with a lower index of refraction. Light is kept in the core by the phenomenon of total internal reflection which causes the fiber to act as a waveguide. To ensure proper transmission light should be confined within the fibre.

Optical fibers typically include a core surrounded by a transparent cladding material with a lower index of refraction. Light is kept in the core by the phenomenon of total internal reflection which causes the fiber to act as a waveguide. To ensure proper transmission light should be confined within the fibre.

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Tagged under Physics · Optics, Nature of Light and Optical Instruments · 2018