Figure 14 shows some of the apparatus needed to investigate the infrared radiation emitted by
a Leslie Cube.
Figure 14
Leslie cube
shiny black
infrared detector
shiny 'silver'
matt black
matt white
heatproof mat
Plan an experiment to investigate how the amount of infrared radiated by a surface depends on
the nature of that surface.
Your answer should include the control variables needed to get a valid result and any extra
apparatus required.
[6 marks]