A tungsten filament is heated to 2700 K. At what wavelength is the maximum amount of radiation

Question:

A tungsten filament is heated to 2700 K. At what wavelength is the maximum amount of radiation emitted? What fraction of the total energy is in the visible range (0.4 to 0.75 m m)?Assume that the filament radiates as a gray body.GIVENHeated tungsten filamentFilament temperature (Tf) = 2700 KASSUMPTIONSThe filament radiates as a graybody