CP5C Using the long wavelengths Flashcards
1
Q
What is the use of radio waves
A
Transmitting radio broadcasts and TV programmes
Radio communication sent with satellites
2
Q
What is the use of microwaves
A
Used for commincations and satellite transmissions e.g phone signals
In microwave to heat food
3
Q
What is the use of infrared
A
Communication at short ranges e.g tv remote
Information sent using optical fibres
Security systems
4
Q
What is the use of visible light
A
The part of the EM spectrum that our eyes detect
Light bulbs emit visible light
5
Q
What type of wave is produced in oscillations in an electrical circuit
A
Radio waves
6
Q
How can radio waves create an alternating current in a circuit
A
When radio waves are absorbed, they can induce oscillations in a circuit with the same frequency as the waves themselves
