This sort of dielectric mirrors provide a superior degree of wavelength-selective reflectance with the necessary totally free floor wavelength λ When the thicknesses of alternating levels d1 and d2 with refractive indices n1 and n2 are such that n1d1 + n2d2 = λ/two which then contributes to the constructive interference https://asenacar134kii5.wikiparticularization.com/user