investigating emission

• What is the name of the equipment used to investigate infrared radiation emission?

  Leslie Cube
• What material is a Leslie cube typically made of?

  Metal, such as aluminium
• How many vertical faces does a Leslie cube have?

  Four vertical faces
• What types of surfaces can be found on a Leslie cube?

  Matt black, matt white, shiny metal, dull metal
• What is the first step in using a Leslie cube for the experiment?

  Place it on a heat-proof mat
• What should you fill the Leslie cube with for the experiment?

  Boiling water
• What should you do after filling the Leslie cube with boiling water?

  Wait for the cube to settle
• How should you measure the temperature of the Leslie cube?

  Hold a thermometer against each face
• What should you find about the temperature of the cube's faces?

  All four faces are the same temperature
• How far should the infrared detector be from the cube's face during measurement?

  10 cm
• What trend should you observe regarding infrared radiation detection?

  More from black than white surfaces
• Why should you repeat the measurements in the experiment?

  To ensure results are reproducible
• What safety precaution should you take when handling the Leslie cube?

  Don't move it when full of boiling water
• What should you be cautious about when pouring boiling water?

  Potential burns from hot water
• What should you ensure before handling equipment after the experiment?

  That it has cooled down enough
• What are the steps to investigate infrared radiation emission using a Leslie cube?

  1. Place the Leslie cube on a heat-proof mat.
  2. Fill it with boiling water.
  3. Wait for it to settle.
  4. Measure temperature of each face.
  5. Use an infrared detector at 10 cm distance.
  6. Record IR radiation from each face.
  7. Repeat measurements for accuracy.
  8. Handle equipment carefully to avoid burns.
• What are the expected results when measuring infrared radiation from different surfaces of a Leslie cube?

  • More IR radiation from black surfaces
  • More IR radiation from matt surfaces
  • Less IR radiation from shiny surfaces