Using Wien's formula, demonstrate that (a) the most probable radiation frequency ωpr∝T;\omega_{p r} \propto T ;ωpr∝T; (b) the maximum spectral density of thermal radiation (uω)max∝\left(u_ {\omega}\right)_ {\max } \propto (uω)max∝ T3T^{3}T3 (c) the radiosity Me∝T4M_{e} \propto T^{4}Me∝T4.