Communicating With Light Flashcards
0
Q
What type of signal is morse code?
A
Pulses of light sent as dots or dashes
Example of digital signal - on and off
1
Q
What is the main advantage of communicating with light
A
Speed up communication over long distances
2
Q
How do optical fibres work?
A
Carry data over long distances
Bounce waves off sides of very narrow core at angle greater than critical angle for the material, causing total internal reflection within core.
3
Q
What are optical fibres used for?
A
Broadband internet cables
Telephone cables
Medical - see inside body
Artificial Christmas trees
4
Q
What are advantages of using light to communicate?
A
Quick
Multiplexing - lots of different signals transmitted down one single optical fibre (don’t need so many cables)
Digital signal = little interference
