Physics GCSE AQA P1.1 Infrared Radiation

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Infrared Radiation

  • Special cameras can 'see' animals and people in the dark, detecting infrared radiation. Every object can emit-give out-infrared radiation in heat.
  • The hotter an item/object is, the more infrared radiation it emits.
  • A thermometer can be used to detect infrared radiation:
    • Using a glass prism, a beam of light should be shone through it.
    • The white light from the beam splits into the colours of the spectrum- Red, orange, yellow, green, light blue, dark blue, violet.
    • On the electromagnetic spectrum, infrared radiation comes just before visible light-before the red side of the colour spectrum, invisible to the eye.
    • Therefore, as the spectrum is shone out from the screen, placing a thermometer next to the red light increases the temperature.
  • Electromagnetic spectrum-electrical and magnetic waves that travel through space:
    • Radio waves
    • Microwaves


Francesca Tray


Thank youuuu



This was really helpful.. Thaaaanks :DDD

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