That is, 0.01% of the radiation is at a wavelength below ⁠ 910 / T ⁠ μm, 20% below ⁠ 2676 / T ⁠ μm, etc. The wavelength and frequency peaks are in bold and occur at 25.0% and 64.6% respectively. The 41.8% point is the wavelength-frequency-neutral peak (i.e. the peak in power per unit change in logarithm of wavelength or frequency). These are the points at which the respective Planck-law functions ⁠ 1 / λ ⁠, ν and ⁠ ν / λ ⁠, respectively, divided by exp (⁠ hν / k B T ⁠) − 1 attain their maxima. The much smaller gap in ratio of wavelengths between 0.1% and 0.01% (1110 is 22% more than 910) than between 99.9% and 99.99% (113374 is 120% more than 51613) reflects the exponential decay of energy at short wavelengths (left end) and polynomial decay at long.