Uses of EM (Edexcel GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
Why can longer radio waves spread out between hills?
Why can longer radio waves spread out between hills?
Due to diffraction
What allows radio waves to travel long distances around the Earth?
What allows radio waves to travel long distances around the Earth?
Reflection off the ionosphere
How do microwaves heat food?
How do microwaves heat food?
Water molecules absorb the energy
Why are microwaves suitable for communicating with satellites?
Why are microwaves suitable for communicating with satellites?
Pass through atmosphere unreflected
How is the energy of infrared radiation transferred to objects?
How is the energy of infrared radiation transferred to objects?
Easily absorbed by the surface
What are infrared cameras used to check in buildings?
What are infrared cameras used to check in buildings?
Heat losses
What do optical fibres transmit to carry information?
What do optical fibres transmit to carry information?
Pulses of light
What do digital cameras use to detect visible light?
What do digital cameras use to detect visible light?
Image sensors
What occurs when chemicals absorb UV radiation and re-emit it as visible light?
What occurs when chemicals absorb UV radiation and re-emit it as visible light?
Fluorescence
What materials absorb X-rays?
What materials absorb X-rays?
Denser materials like bones/metals
What is one use of gamma rays in medicine?
What is one use of gamma rays in medicine?
Sterilise medical instruments
What happens to frequency as wavelength decreases for EM waves?
What happens to frequency as wavelength decreases for EM waves?
Frequency increases