Q:  What sort of spectrum does a very dense, hot gas produce?

         A blackbody spectrum.


  Q:  If the gas has a temperature of T = 3000 Kelvin, what is the
          wavelength at which the spectrum reaches its peak?


                        2.898 x 10^(-3) m*K
           lambda  =   ---------------------  =  966 x 10^(-9) m
                             3000 K


                   =    966 nm