What is the primary advantage of using fiber-optic cables for communication?

• They are cheaper than metal wires.

• They can transmit information at the speed of light.

• They are easier to install than metal wires.

• They do not require any maintenance.

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How does a landline phone transmit your voice to a friend?

• By converting sound waves into light signals.

• By converting sound waves into electrical signals.

• By sending sound waves directly through the air.

• By using digital signals to transmit sound.

What happens to an electrical signal as it travels along a metal wire over long distances?

• It gains power and becomes clearer.

• It loses power and picks up noise.

• It remains unchanged.

• It converts into a digital signal.

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How is a sound wave converted into a digital signal?

• By measuring the frequency of the wave.

• By measuring the height of the wave at certain intervals.

• By converting it directly into light flashes.

• By amplifying the wave.

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What role does a laser play in fiber-optic communication?

• It amplifies the sound waves.

• It converts electrical signals into sound waves.

• It sends patterns of light flashes through the fiber-optic cable.

• It measures the height of sound waves.