4) Planck’ s Quanti A玉阻古县三 Planck's Radiati o(ar a number of cap/) theories based on cl ^(nm) had only limited sud 1.02.03.04.05.06.0708.09.0 Example:1896, Wiens formula(维恩公式) Wiens formula isn't fit to M 0(T) -e ar the experimental points 5 at long wavelength Where c and c are constants that must be determined by the experimental data4) Planck’s Quantum Supposition普朗克量子假说 Planck’s Radiation Formula 普朗克辐射公式 a number of capable physicists advanced theories based on classical physics, which, however, had only limited success. Example : 1896, Wien’s formula (维恩公式) T c T e c M    2 5 1 0( ) − = Where C1 and C2 are constants that must be determined by the experimental data. Wien’s formula isn’t fit to the experimental points at long wavelength. 1.02.0 3.04.05.06.0 7.08.09.0 M0(T ) (nm) ) ( . 1 1 − − m wcm 