Infrared
2 marks · EasyA person stands near an electric fire. Explain how the electric fire warms the person using infrared radiation.
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The electric fire emits infrared radiation, which transfers energy directly to the person's skin, making them feel warmer.
Also accept: Infrared radiation from the fire is absorbed by the person's skin and increases its temperature.
Common mistakes: Heating occurs by conduction through the air.; Only visible light is used.
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Marking points
B1 · 1 mark · States that electric fire emits infrared radiation.
B2 · 1 mark · Explains this radiation is absorbed by the person (e.g., 'transfers energy to skin').
Worked solution
The electric fire emits infrared radiation, which travels through the air and is absorbed by the person’s skin, transferring energy and making the person feel warmer.