Fibre Optics

Fibre optic cables use light to transmit information globally, supporting over 32,000 calls simultaneously. They work by converting electrical signals into light pulses, which travel through glass strands using total internal reflection. This method ensures minimal data loss and high efficiency. Fibre optics are thin, with each strand capable of carrying multiple signals, surpassing copper cables in capacity.

What is the primary medium used by fibre optic cables to transmit information?

• Magnetic fields

• Electricity

• Sound waves

• Light

How is electrical information converted for transmission in fibre optic cables?

• By using sound waves

• By converting it into light pulses

• By using magnetic fields

• By converting it into radio waves

What phenomenon allows light to remain within the optical fibres?

• Diffraction

• Refraction

• Dispersion

• Total internal reflection

What is the critical angle for total internal reflection in fibre optic cables?

• 42 degrees

• 30 degrees

• 90 degrees

• 60 degrees

How do fibre optic cables compare to copper cables in terms of information capacity?

• They carry the same amount of information

• They carry less information

• They do not carry information

• They carry more information