Light Signals Can Travel Through Optical Fibres

Question 1

What can visible light also be used for?

Answer 1

Communication using optical fibres

Question 2

What do optical fibres do?

Answer 2

Carry data over long distances as pulses of light

Question 3

How do optical fibres work?

Answer 3

By bouncing waves off the sides of a very narrow core

Question 4

What does the pulse of light do?

Answer 4

Enters the fibre at a certain angle at one end and is reflected again and again until it emerges at the other end

Question 5

What are optical fibres increasingly being used for?

Answer 5

• Telephone and broadband internet cables

- medical purposes to ‘see inside’ the body without having to operate