Questions and Answers
What happens when a ray of light traveling from a denser medium to a rarer medium is incident at an angle greater than the critical angle?
It gets reflected instead of refracted
What is the function of repeater stations in optical fiber communication?
Regenerate the optical signal and boost its speed
What is the refractive index of the cladding in optical fibers?
Lower than that of the core
How does the speed of light in optical fiber core compare to its speed in vacuum?
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Why is optical fiber cable used for long-distance transmission of communication signals?
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Study Notes
Total Internal Reflection
- When a ray of light travels from a denser medium to a rarer medium at an angle greater than the critical angle, total internal reflection occurs.
Optical Fiber Communication
Repeater Stations
- Repeater stations in optical fiber communication amplify the signal to compensate for attenuation, ensuring continuous signal transmission.
Optical Fiber Structure
Refractive Index
- The refractive index of the cladding in optical fibers is lower than that of the core.
Speed of Light
- The speed of light in the optical fiber core is slower than its speed in a vacuum due to the denser medium.
Long-Distance Transmission
- Optical fiber cables are used for long-distance transmission of communication signals because they offer low attenuation, high bandwidth, and signal security.
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