Solving a problem in physics section 18 paragraph 76 qu

Solving a problem in physics section 18 paragraph 76 qu

76. The black body is heated by the temperature T1 = 500K to T2 = 2000K. Define:
1) how many times it has increased irradiance;
2) How has the wavelength corresponding to the maximum spectral density of irradiance

Additional information:

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)