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What is the principle behind the transmission of light in optical fibers?

• Refraction
• B) Diffraction
• C) Total Internal Reflection
• D) Dispersion

What is the core material of most optical fibers?

• A) Single-mode fiber
• B) Multi-mode fiber
• C) Step-index fiber
• D) Plastic fiber

What is the refractive index of the cladding in optical fibers relative to the core?

• A) Copper
• B) Silicon dioxide
• C) Aluminum
• D) Carbon

What is the purpose of cladding in an optical fiber?

• A) Higher than the core
• B) Equal to the core
• C) Lower than the core
• D) Does not matte

What causes attenuation in optical fibers?

• A) To provide strength
• B) To reflect light back into the core
• C) To transmit light
• D) To absorb unwanted signals

What is the wavelength range for optical communication?

• A) Scattering losses
• B) Absorption losses
• C) Bending losses
• D) All of the above

Which of the following is NOT an advantage of optical fiber communication?

• A) 200–300 nm
• B) 800–1700 nm
• C) 10–100 μm
• D) 400–700 nm

What does "numerical aperture" measure in an optical fiber?

• A) High bandwidth
• B) Immunity to electromagnetic interference
• C) High attenuation
• D) Lightweight

What type of dispersion occurs in single-mode fibers?

• A) Power efficiency
• B) Light-gathering ability
• C) Signal distortion
• D) Bandwidth

Which material is commonly used for plastic optical fibers?

• A) Modal dispersion
• B) Material dispersion
• C) Chromatic dispersion
• D) Both B and C