Fiber Optic Cable Concepts

Fiber optic cables are essential for modern communication, providing high-speed internet and reliable connections. They work on the principle of total internal reflection, with light signals traveling through a core surrounded by cladding. There are two main types: single mode for long distances and multimode for short ranges. Data is transmitted as light signals, converted from digital data using LEDs or lasers. Fiber optic networks can be passive or active, with the former being more energy-efficient. These cables offer higher bandwidth, immunity to interference, and improved security compared to copper cables.

What is the primary role of fiber optic cables in global communication?

• To connect telephone lines

• To transmit radio signals

• To form the backbone of the internet

• To provide electricity

What happens to light when it passes from one medium to another with a different refractive index?

• It refracts

• It accelerates

• It stops

• It changes color

What is the phenomenon called when light is completely reflected back into the original medium?

• Dispersion

• Total internal reflection

• Diffraction

• Scattering

What are the three main layers of a fiber optic cable?

• Core, cladding, protective sheath

• Core, shell, outer layer

• Cladding, shell, outer layer

• Core, sheath, outer layer

Which type of fiber optic cable is best suited for long-distance transmission?

• Plastic fibers

• Single-mode fibers

• Multimode fibers

• Copper cables

How is digital data converted for transmission through fiber optic cables?

• Into sound waves

• Into electrical signals

• Into binary light signals

• Into magnetic fields

What is the purpose of wavelength division multiplexing in fiber optics?

• To reduce signal loss

• To combine multiple light signals

• To increase the speed of light

• To change the color of light

Which type of network uses electronic devices to reinforce the signal?

• Passive networks

• Active networks

• Copper networks

• Wireless networks

What is one key advantage of fiber optic cables over copper cables?

• Higher data transfer rates

• Heavier and thicker

• Higher electromagnetic interference

• Lower bandwidth

Why are fiber optic cables considered more secure than copper cables?

• They are more expensive

• They are immune to eavesdropping

• They are easier to install

• They emit electrical signals