72. As a result of heating the black body wavelength corresponding to the maximum spectral density of the irradiance, moved with λ1 = 2,7 m to λ2 = 0,9 m. Determine how many times has increased: 1) irradiance of the body; 2) the maximum spectral density of the irradiance of the body. The maximum spectral density of the black body irradiance increases according to the law (rλ, T) max = CT5, where C = 1,3 • 10-5 W / (m3 • K5).

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