Thermometry and Fiber Optics in Physics

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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 changes its color
It gets absorbed by the rarer medium
It slows down and then refracts
It gets reflected instead of refracted (correct)

What is the function of repeater stations in optical fiber communication?

Regenerate the optical signal and boost its speed (correct)
Prevent total internal reflection
Convert electrical signals into light signals
Amplify the light signal

What is the refractive index of the cladding in optical fibers?

Equal to that of the core
Unrelated to the core's refractive index
Lower than that of the core (correct)
Higher than that of the core

How does the speed of light in optical fiber core compare to its speed in vacuum?

<p>About 30% slower (A)</p> Signup and view all the answers

Why is optical fiber cable used for long-distance transmission of communication signals?

<p>It can be passed through water without damage (D)</p> Signup and view all the answers

Flashcards

Light reflection at critical angle

When light moves from a denser to a less dense medium and hits the boundary at an angle greater than the critical angle, it is reflected back into the denser medium.

Optical repeater function

Repeater stations in optical fibers boost and regenerate the optical signal, improving transmission quality and speed.

Cladding refractive index

The refractive index of cladding material in optical fibers is lower than that of the core.

Light speed in optical fiber

The speed of light in the core of an optical fiber is slightly slower than the speed of light in a vacuum.

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Long-distance fiber use

Optical fibers are favored for long-distance communication because they can transmit signals over great distances with minimal signal loss and can withstand water.

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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.