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10Optical fibres work on the principle of total internal reflection.
The cladding of an optical fibre has a higher refractive index than the core.
Light can travel through optical fibres even if they are bent slightly.
Endoscopy uses optical fibres to view internal organs without surgery.
Colonoscopy examines the stomach using optical fibres.
Laparoscopic or keyhole surgery uses optical fibres to illuminate the body’s interior.
Optical fibres cannot transmit high-speed internet signals.
Optical fibres are only used in communication, not in medicine.
Total internal reflection occurs only if the angle of incidence is less than the critical angle.
A single optical fibre can carry thousands of telephone calls simultaneously.
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What principle allows light to remain inside an optical fibre?
The part of an optical fibre with a higher refractive index is:
In optical fibres, light will escape if the angle of incidence is:
Which of the following uses optical fibres in medicine?
Optical fibre communication allows data transmission speed up to:
The material surrounding the core of an optical fibre is called:
Total internal reflection occurs when light passes from:
In keyhole surgery, optical fibres help to:
Optical fibres can transmit:
International optical fibre networks are laid:
The phenomenon that allows light to travel through an optical fibre without escaping is called ______ internal reflection.
The thin transparent medium used in fibre optics for transmitting light is called an ______ fibre.
The ______ of an optical fibre has a higher refractive index than the cladding.
Light is transmitted in an optical fibre when the angle of incidence on the fibre-cladding interface is ______ than the critical angle.
Optical fibres are used in ______ to transmit data at high speed using light.
The medical use of optical fibres includes ______ and ______.
A ______ incorporates optical fibres to perform keyhole surgery.
Optical fibres allow simultaneous transmission of ______ of telephone calls.
Data transmitted through optical fibres can reach speeds of ______ Gbps (1 Gigabyte per second).
Optical fibres are laid ______, ______ the sea, and in the air for long-distance communication.