Solve Study Textbooks Guides

Use app

Login

>>Class 12
>>Physics
>>Ray Optics and Optical Instruments
>>Total Internal Reflection
>> $The core of an optical fiber transmits l$

Question

The core of an optical fiber transmits light with a minimal loss if it is surrounded by what?

A

water

B

diamond

C

air

D

glass

E

fused quartz

Medium

Open in App

Updated on : 2022-09-05

Solution

Verified by Toppr

Correct option is C)

Answer (c).
We want a big difference between indices of refraction to have total internal reflection under the widest range of conditions.

Solve any question of Ray Optics and Optical Instrument with:-

Patterns of problems

Was this answer helpful?

0

0

Similar questions

In modern communication, use of optical fiber is increased for sending information. The reason behind this being, the speed of light is more than the speed of electron. Optical fiber used in communication systems works on which principle ?

Figure shows an optical fiber in which a central plastic core of index of refraction $n_{1} = 1.58$ is surrounded by a plastic sheath of index of refraction $$n_2 = 1.53. Light can travel along different paths within the central core, leading to different travel times through the fiber. This causes an initially short pulse of light to spread as it travels along the fiber, resulting in information loss. Consider light that travels directly along the central axis of the fiber and light that is repeatedly reflected at the critical angle along the core-sheath interface, reflecting from side to side as it travels down the central core. If the fiber length is 300 m, what is the difference in the travel times along these two routes?

1777494

Above figure depicts a simplistic optical fiber: a plastic core ( $n_{1} = 1.58$ ) is surrounded by a plastic sheath ( $n_{2} = 1.53$ ). A light ray is incident on one end of the fiber at angle $θ$ . The ray is to undergo total internal reflection at point $A$ , where it encounters the coresheath boundary. (Thus there is no loss of light through that boundary.) What is the maximum value of $θ$ that allows total internal reflection at $A$ ?

1781036

(a) What is the structure of an optical fiber?
(b) What is the principle used for transmitting audio and video signals using optical fiber? Explain the principle.

The velocity of light in the core of a step index fibre is $2 \times 10^{8} m / s$ and the critical angle at the core-cladding interfere is $80^{0}$ . Find the numerical aperture and the acceptance angle for the fibre in air. The velocity of light in vacuum is $3 \times 10^{8} m / s$ .

More From Chapter

Ray Optics and Optical Instruments

View chapter >

Revise with Concepts

Total Internal Reflection and Critical angle

ExampleDefinitionsFormulaes

Optical Fibres

ExampleDefinitionsFormulaes

Applications of Total Internal Reflection

ExampleDefinitionsFormulaes

Learn with Videos

Can you see Internal Reflection?

Total internal reflection and critical angle

Advanced applications of total internal reflection

Shortcuts & Tips

Problem solving tips

Important Diagrams

Common Misconceptions

Memorization tricks

Practice more questions

Medium Questions