Radiation and absorption

• Leslie cube


  A device used to demonstrate the properties of infrared radiation
• Items used with the Leslie cube

  • Kettle
  • Infrared detector or thermal imaging camera
  • Heat-proof mat
• Using the Leslie cube

  1. Put the Leslie cube onto the heat-proof mat

  2. Fill the cube with very hot water and put the lid on the cube

  3. Use the detector or camera to measure the amount of infrared radiated from each surface

  4. Make sure that the detector is the same distance from each surface

  5. Draw a chart to show the amount of infrared radiated by each type of surface
• Safety: Care with hot water
• Surfaces of the Leslie cube

  • Shiny 'silver'
  • Shiny black
  • Matt black
  • Matt white
• The infrared detector is used to measure the amount of infrared radiated from each surface