Fibre Optics

Optical fibre based on the principle of

• total internal reflection.

• total internal refraction.

• diffraction.

• interference.

Tags

NGSS.HS-PS4-5

The core of the optical fibre is

• opaque and conducting material.

• opaque and dielectric material.

• transparent and conducting material.

• transparent and dielectric material.

A measurement of the ability of an optical fibre to capture light is called

• acceptance angle.

• cladding.

• numerical aperature.

• critical angle.

The unit of Numerical aperature is

• meter

• degree

• Coulomb per meter

• no unit.

Which of the following statement is correct?

• Refractive index of core and cladding are equal.

• Refractive index of core is more then that of cladding.

• Refractive index of core is less then that of cladding.

• Refractive index of core is less or equal to that of cladding.

If the numerical aperature of an optical fibre is 0.515, then the maximum angle of incidence is __________ degree.

• 0.008

• 17.5

• 31

• 67

The refractive index of core and cladding for a step index fibre are 1.42 and 1.29 respectively. The numerical aperature of the fibre is

• 0.3523

• 0.59

• 0.13

• 2.71

Which of the following is ( are) correct?

• The refractive index of the core of the step index fiber is constant throughout the core.

• The refractive index of the graded index fibre is maximum at the centre of the core and then it decreases towards core-cladding interface.

• The bandwidth in fibre optical communication is very high as against in case of coaxial cable transmission.

• All the above

Which part is not included in the fiber-optic communication system?

• Transmitter

• Transmission channel

• Transformer

• Receiver

The function of cladding is

• to produce refraction of rays.

• to produce total internal reflections of rays.

• to produce transmission of Ray's.

• to provide a firm support to the core glass.