EM waves for communication (Edexcel GCSE Physics Combined Science): Flashcards
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13 cards from this deck
Radio waves: wavelength and frequency
Radio waves: wavelength and frequency
Longest wavelength, lowest frequency
What happens when antenna absorbs radio waves?
What happens when antenna absorbs radio waves?
Induces AC at same frequency as radio waves
How radio waves are produced
How radio waves are produced
Oscillations in electrical circuits
What is a transmitter?
What is a transmitter?
Device where electrons oscillate to produce radio waves
Long wave radio wavelength range
Long wave radio wavelength range
km
Why long wave received halfway around world
Why long wave received halfway around world
Bends around curved surface of Earth
Short wave radio wavelength range
Short wave radio wavelength range
metres
Why short wave travels long distances
Why short wave travels long distances
Reflected by Earth's atmosphere
What does Bluetooth use for communication?
What does Bluetooth use for communication?
Short-wave radio waves
TV & FM signal requirement for clear reception
TV & FM signal requirement for clear reception
Direct line of sight with transmitter
Waves used for satellite communication
Waves used for satellite communication
Microwaves and radio waves
Why microwaves/radio waves work well for satellites
Why microwaves/radio waves work well for satellites
Pass through Earth's atmosphere easily
Main uses of radio waves
Main uses of radio waves
Communication and broadcasting