1.  Why are firemen suits made of shiny materials?

 2.  Why is the back of the fridge painted black?

 3.  Fill in the gaps in the following statements:

      A dull black surface is a                           of radiation.

      A bright shiny surface is a                          of radiation.

 4.  What type of electromagnetic wave is emitted from a remote control?

 5.  Explain how infrared is used in cooking.