AQA · Physics · 8463
GCSE Physics: Uses and applications of electromagnetic waves
Waves · AQA GCSE Physics (8463), specification point 4.6.2.4. Cards are generated from the exam board's own specification for "Uses and applications of electromagnetic waves", and every card links back to the page it came from. Specification © AQA — used with attribution.
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Which electromagnetic waves are used for television and radio broadcasting?
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Radio waves.
Which electromagnetic waves are used for satellite communications?
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Microwaves.
Name two types of electromagnetic wave used for cooking food.
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Microwaves and infrared.
Which electromagnetic waves are used in electrical heaters?
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Infrared radiation.
Infrared cameras detect objects by the ? radiation they emit.
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infrared
Which electromagnetic waves are used in fibre optic communications?
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Visible light.
Which electromagnetic waves are used in energy efficient lamps?
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Ultraviolet (UV) radiation.
Sun tanning is caused by exposure to ? radiation.
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ultraviolet
Which two types of electromagnetic wave are used for medical imaging and treatments?
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X-rays and gamma rays.
Why are microwaves suitable for satellite communications?
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They pass through the Earth's atmosphere without being reflected or absorbed, so they can reach satellites in orbit.
Why is visible light suitable for fibre optic communications?
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It can be totally internally reflected along thin glass fibres with very little energy loss, carrying signals over long distances.
Why are X-rays suitable for medical imaging?
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They pass through soft tissue but are absorbed by denser material such as bone, producing a shadow image.
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