Fiber Optics Practice Exam Quiz

Reviewed by Matt Balanda
Matt Balanda, BS, Science |
Physics Expert
Review Board Member
Matt graduated with a Master's in Educational Leadership for Faith-Based Schools from California Baptist University and a Bachelor's of Science in Aerospace Engineering and Mathematics from the University of Arizona. A devoted leader, transitioned from Aerospace Engineering to inspire students. As the High School Vice-Principal and a skilled Physics teacher at Calvary Chapel Christian School, his passion is nurturing a love for learning and deepening students' connection with God, fostering a transformative educational journey.
, BS, Science
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Fiber Optics Practice Exam Quiz - Quiz

How good you're in fiber optics? Take up this practice exam and see for yourself. Also, this quiz will make you learn about different Fiber optics topics. A fiber optic cable can contain various glasses through which light pulses get through for information to be transferred. There is much that goes into ensuring that the information being spread is transferred at great speeds. Give this quiz a try and get to refresh your memories. Good luck!


Questions and Answers
  • 1. 

    What does LASER stand for?

    • A.

      Light Amplification by Stimulated Emission of Radiation

    • B.

      Light Administration of Stimulated Energy Radiation

    • C.

      Laser Amplification by Stimulated Emission of Radiation

    • D.

      None of the above

    Correct Answer
    A. Light Amplification by Stimulated Emission of Radiation
    Explanation
    LASER stands for Light Amplification by Stimulated Emission of Radiation. It is a type of electromagnetic machine that can emit light, which is an Electromagnetic Radiation. Such lights are both coherent and very weak1. They are produced by a method named as optical amplification. 

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  • 2. 

    Focal length is determined by?

    • A.

      The distance from the laser to the lens

    • B.

      The distance from the battery to the point where the light converges

    • C.

      The distance from the center of the lens to the point where the light converges

    • D.

      None of the above

    Correct Answer
    C. The distance from the center of the lens to the point where the light converges
    Explanation
    The focal length of a lens is determined by the distance from the center of the lens to the point where the light converges. This distance is important because it determines how the lens bends or refracts light, causing it to converge or diverge. The focal length is a fundamental property of a lens and affects the image formation and magnification. The other options, such as the distance from the laser to the lens or the distance from the battery to the point where the light converges, are not correct because they do not directly relate to the focal length of the lens.

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  • 3. 

    Refraction is when?

    • A.

      Light bends towards the normal

    • B.

      Light bends away from the normal

    • C.

      Light becomes one central dot

    • D.

      Light reflects back from the object 

    Correct Answer
    A. Light bends towards the normal
    Explanation
    Refraction is the bending of light as it passes from one medium to another with a different optical density. When light travels from a medium with a lower optical density to a medium with a higher optical density, it bends towards the normal, which is an imaginary line perpendicular to the surface of the interface between the two mediums. This change in direction is due to the change in speed of light as it enters the new medium.

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  • 4. 

    Diffraction is when?

    • A.

      Light bends towards the normal

    • B.

      Light bends away from the normal

    • C.

      Light becomes one central dot

    • D.

      Light reflects back from the object 

    Correct Answer
    B. Light bends away from the normal
    Explanation
    Diffraction is the phenomenon where light waves spread out or bend when they encounter an obstacle or pass through a narrow opening. When light bends away from the normal, it means that it deviates from its original path as it passes through a medium with a different refractive index. This bending of light away from the normal is a characteristic of diffraction and is observed in various situations, such as when light passes through a narrow slit or around edges of objects.

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  • 5. 

    What happens when a laser is pointed into a prism?

    • A.

      The light shines straight through the prism

    • B.

      The light counteracts and shines in the opposite direction

    • C.

      The light shines out the the same side but at a small angle

    • D.

      All of the above

    Correct Answer
    B. The light counteracts and shines in the opposite direction
    Explanation
    When a laser is pointed into a prism, the light does not shine straight through the prism or shine out the same side at a small angle. Instead, the light counteracts and shines in the opposite direction. This is due to the phenomenon of refraction, where the light undergoes a change in direction as it passes through the prism, causing it to bend and emerge in a different direction than it entered.

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  • 6. 

    Refraction happens because?

    • A.

      The light slows down in a material

    • B.

      The light changes color in a material

    • C.

      The light speeds up in a material

    • D.

      The light stops in a material

    Correct Answer
    A. The light slows down in a material
    Explanation
    Refraction occurs because light slows down when it enters a different medium. When light travels from one material to another, it changes speed due to the change in the refractive index of the material. This change in speed causes the light to bend or change direction, resulting in the phenomenon of refraction.

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  • 7. 

    Fiber Optics is

    • A.

      Communication over copper wires

    • B.

      Communication over speaker wire

    • C.

      Communication over thin stands of glass

    • D.

      All of the above

    Correct Answer
    C. Communication over thin stands of glass
    Explanation
    Fiber optics refers to the method of communication that utilizes thin strands of glass to transmit data. Unlike communication over copper wires or speaker wire, which rely on electrical signals, fiber optics use light signals to transmit information. These thin strands of glass, known as optical fibers, are capable of transmitting data at high speeds over long distances with minimal signal loss. Therefore, the correct answer is "Communication over thin stands of glass."

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  • 8. 

    What application does fiber optics not include?

    • A.

      LANS

    • B.

      Utilities

    • C.

      CATV

    • D.

      Desktop Publishing

    Correct Answer
    D. Desktop Publishing
    Explanation
    Fiber optics is a technology that uses thin strands of glass or plastic to transmit data using light signals. It is commonly used in various applications such as telecommunications, internet connections, and cable television (CATV). However, it is not typically used in the field of desktop publishing. Desktop publishing primarily involves the creation and design of printed materials using computer software, and it does not require the use of fiber optics for data transmission.

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  • 9. 

    Why are Fiber Optics used?

    • A.

      Security

    • B.

      Speed

    • C.

      Distance

    • D.

      Freedom from Interference

    Correct Answer(s)
    A. Security
    B. Speed
    C. Distance
    D. Freedom from Interference
    Explanation
    Fiber optics is used for its various advantages including security, speed, distance, and freedom from interference. Fiber optic cables transmit data using light signals, making it difficult for hackers to intercept or tap into the data being transmitted, thus ensuring security. The use of light signals also allows for high-speed data transmission, making fiber optics ideal for applications that require fast and reliable communication. Additionally, fiber optics can transmit data over long distances without significant loss of signal quality, making it suitable for long-distance communication. Lastly, fiber optics is immune to electromagnetic interference, providing a stable and interference-free transmission medium.

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  • 10. 

    Outside plant premises is?

    • A.

      Installing fiber optics in a LAN

    • B.

      Installing fiber optics outside

    • C.

      Installing fiber optics in a school

    • D.

      None of the above

    Correct Answer
    B. Installing fiber optics outside
    Explanation
    The correct answer is "Installing fiber optics outside." This refers to the installation of fiber optic cables in areas that are outside of a building or premises. This can include installing cables underground, on utility poles, or along roadways to connect different locations. This is different from installing fiber optics inside a building or premises, such as in a LAN or school.

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  • 11. 

    The angle of diffraction refers to?

    • A.

      The change in angle of the diffraction of a laser light

    • B.

      The change in direction of the laser light

    • C.

      The change in color of the laser light

    • D.

      None of the above

    Correct Answer
    A. The change in angle of the diffraction of a laser light
    Explanation
    The angle of diffraction refers to the change in angle of the diffraction of a laser light. Diffraction occurs when a wave encounters an obstacle or passes through a narrow opening, causing it to bend and spread out. The angle of diffraction is the angle between the incident wave and the direction of the diffracted wave. It determines the extent to which the laser light is spread out and can be used to analyze the properties of the diffracted light.

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  • 12. 

    The core of a fiber optic cable is composed

    • A.

      Copper wiring

    • B.

      Thin strands of glass

    • C.

      Sound waves

    • D.

      All of the above

    Correct Answer
    B. Thin strands of glass
    Explanation
    The core of a fiber optic cable is composed of thin strands of glass. Fiber optic cables are designed to transmit data using light signals. The glass strands, known as optical fibers, have a high refractive index that allows light to be transmitted through them with minimal loss. This composition enables the cable to carry large amounts of data over long distances at high speeds. Copper wiring and sound waves are not typically used in the core of fiber optic cables.

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  • 13. 

    The light used in Fiber Optic cabling is

    • A.

      UV

    • B.

      Visible

    • C.

      Infrared

    • D.

      Invisible

    Correct Answer
    C. Infrared
    Explanation
    Fiber optic cabling uses infrared light. Infrared light has a longer wavelength than visible light, making it ideal for transmitting data through the optical fibers. It is not visible to the human eye, but it can carry a large amount of information over long distances without any loss in signal quality. This makes it suitable for high-speed data transmission in telecommunications and internet networks.

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  • 14. 

    What is the approx. wavelength of light used in Fiber Optics?

    • A.

      850 nanometers

    • B.

      1000 nanometers

    • C.

      1011 nanometers

    • D.

      1200 nanometers

    • E.

      1300 nanometers

    Correct Answer
    E. 1300 nanometers
    Explanation
    The approximate wavelength of light used in Fiber Optics is 1300 nanometers.

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  • 15. 

    What is the purpose of the demultiplexer in fiber optics?

    • A.

      It multiplies the intensity of the light

    • B.

      It reduces the intensity of the light

    • C.

      It refracts the light into the correct optical fiber locations

    • D.

      None of the above

    Correct Answer
    C. It refracts the light into the correct optical fiber locations
    Explanation
    The purpose of the demultiplexer in fiber optics is to refract the light into the correct optical fiber locations. A demultiplexer is a device that takes a single input signal and directs it to multiple output channels. In the context of fiber optics, it is used to separate different wavelengths of light and send them to their respective fiber optic cables. This allows for the transmission of multiple signals simultaneously over a single fiber optic cable, increasing the capacity and efficiency of the system.

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  • 16. 

    What is a fiber optic connector?

    • A.

      A splice with two wires

    • B.

      A component created to convert data

    • C.

      A component designed to protect the glass strands

    • D.

      None of them 

    Correct Answer
    B. A component created to convert data
    Explanation
    A fiber optic connector is a component that is created to convert data. It is used to connect two fiber optic cables together, allowing the transmission of data between them. The connector ensures a secure and reliable connection, maintaining the integrity of the data being transmitted. It is designed to align and join the ends of the fiber optic cables, enabling efficient and accurate data transfer.

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  • 17. 

    Total internal reflection relates to:

    • A.

      The angle of the light reflecting in the core of the fiber

    • B.

      The ability to hold in all light sources to speed up the data

    • C.

      The bouncing back of the light within the fiber core.

    • D.

      Passing from a rarer medium to a denser medium

    Correct Answer(s)
    A. The angle of the light reflecting in the core of the fiber
    B. The ability to hold in all light sources to speed up the data
    C. The bouncing back of the light within the fiber core.
    Explanation
    Total internal reflection relates to the angle of the light reflecting in the core of the fiber, the ability to hold in all light sources to speed up the data, and the bouncing back of the light within the fiber core.

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  • 18. 

    What is the purpose of the cladding on the fiber cables?

    • A.

      To prevent light from escaping

    • B.

      Total internal reflection

    • C.

      Both a and b

    • D.

      None of the above

    Correct Answer
    C. Both a and b
    Explanation
    The purpose of the cladding on fiber cables is to prevent light from escaping and to promote total internal reflection. The cladding acts as a protective layer around the core of the fiber cable, ensuring that the light signals transmitted through the core stay contained within the cable. This prevents any loss of signal and allows for efficient transmission of data through the fiber optic cable.

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Matt Balanda |BS, Science |
Physics Expert
Matt graduated with a Master's in Educational Leadership for Faith-Based Schools from California Baptist University and a Bachelor's of Science in Aerospace Engineering and Mathematics from the University of Arizona. A devoted leader, transitioned from Aerospace Engineering to inspire students. As the High School Vice-Principal and a skilled Physics teacher at Calvary Chapel Christian School, his passion is nurturing a love for learning and deepening students' connection with God, fostering a transformative educational journey.

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  • Current Version
  • Jan 11, 2024
    Quiz Edited by
    ProProfs Editorial Team

    Expert Reviewed by
    Matt Balanda
  • Apr 15, 2009
    Quiz Created by
    Ntruex
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