EM waves for communication (Edexcel GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
11 questions from this quiz
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Practise the questions
11 questions from this quiz
What property do radio waves have in the EM spectrum?
What property do radio waves have in the EM spectrum?
Longest wavelength & lowest frequency
What happens when radio waves are absorbed by an antenna?
What happens when radio waves are absorbed by an antenna?
Induce AC at same frequency as the waves
How are radio waves generated?
How are radio waves generated?
By oscillations in electrical circuits
What is the wavelength range of long wave radio?
What is the wavelength range of long wave radio?
1-10 km
Why can long wave radio be received from halfway around the world?
Why can long wave radio be received from halfway around the world?
Wavelengths bend around Earth's surface
What is the wavelength range of short wave radio?
What is the wavelength range of short wave radio?
10-100 metres
How do short wave radio signals travel long distances?
How do short wave radio signals travel long distances?
Reflected by Earth's atmosphere
What type of radio waves does Bluetooth use?
What type of radio waves does Bluetooth use?
Short-wave for short distances
What is required for clear TV and FM radio signals?
What is required for clear TV and FM radio signals?
Direct line of sight with transmitter
Which waves are used for satellite communication?
Which waves are used for satellite communication?
Both microwaves & radio waves
Why are microwaves & radio waves suitable for satellites?
Why are microwaves & radio waves suitable for satellites?
They pass through Earth's atmosphere