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More cards in this set
Card 6
Front
Why is morse code a digital signal?
Back
Card 7
Front
Advantages (2) and Disadvantage of using light signals for communication.
Back
Card 8
Front
Advantages (2) and Disadvantage of using radio signals for communication.
Back
Card 9
Front
Advanatges (2) and Disadvantage of using electrical signals for communication.
Back
Card 10
Front
What beam of light does a laser produce?
Back
Card 11
Front
Why do most lasers produce an intense coherent beam of light?
Back
Card 12
Front
How is a laser used in a CD player?
Back
Card 13
Front
How is the CD detected?
Back
Card 14
Front
Light rays and infrared rays change speed when they pass from...
Back
Card 15
Front
Why do light rays and infrared rays change speed when they pass from certain materials?
Back
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