Infra-red
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Contents
Key Stage 4
Meaning
Infrared are the third lowest frequency and third longest wavelength electromagnetic waves.
About Infra-red
Properties
Applications
- Different frequencies of infra-red have different applications.
- Infra-red is used in remote controls and night vision because it is invisible to the human eye but can be transmited through the air without being absorbed.
- Infra-red can be used in thermal imaging because objects emit infra-red radiation due to their temperature. The higher the temperature the more infra-red they emit.
- Infra-red can be used to cook food because it can cause atoms and molecules to vibrate, heating the food.