The consequence is that the shape of the black-body radiation function (which was not yet understood) would shift proportionally in frequency (or inversely proportionally in wavelength) with temperature. When Max Planck later formulated the correct black-body radiation function it did not explicitly include Wien's constant b . Rather, the Planck constant h was created and introduced into his new formula. From the Planck constant h and the Boltzmann constant k , Wien's constant b can be obtained.