P1 1.1 INFRARED RADIATION

  • What is infrared radiation?
  • Do all objects give off infrared radiation?
  • How does infrared radiation depend on the temperature of an object?
HideShow resource information
  • Created by: tgillmore
  • Created on: 22-02-14 17:33
View mindmap
  • P1 1.1 INFRARED RADIATION
    • Seeing in the Dark
      • We can use infrared cameras to see animals in the dark
        • These cameras detect INFRARED RADIATION
        • Every object EMITS infrared radiation
    • Electromagnetic Spectrum
      • RADIO WAVES, MICROWAVES and VISIBLE LIGHT are all part of the electromagnetic spectrum
    • Energy from the Sun
      • The sun emits all types of electromagnetic radiation
        • The earths atmosphere absorbs most of this
          • This doesn't block infrared radiation
    • The Greenhouse effect
      • SHORT WAVELENGTH IR FROM THE SUN CAN PASS THROUGH THE GLASS TO WARM THE OBJECTS INSIDE THE GREENHOUSE
        • IR FROM THESE WARM OBJECTS IS TRAPPED INSIDE BY THE GLASS BECAUSE THE OBJECTS EMIT IR OF LONGER WAVELENGTHS THAT CANT PASS THROUGH THE GLASS
          • So the greenhouse stays warm
      • Gasses in the atmosphere such as water vapour, methane, and carbon dioxide trap IR  from the Earth
    • Detecting Infrared radiation
      • We can use a thermometer with a blackened bulb to detect IR
    • KEY POINTS
      • Infrared radiation is energy transfer by electromagnetic waves
      • All objects emit infrared radiation
      • The hotter an object is, the more IR it emits in a given time

Comments

MikeyStokey

This was very useful. Thank you very much. :)

Similar Physics resources:

See all Physics resources »See all Energy transfer by heating resources »