Peegeldusfaasimuutus on kõige olulisem mittedielektriliste materjalide, nt mõõteobjekti metallist pindade puhul, millel on õhukesed pinded erinevatest materjalidest, mis tekitavad õhukese kile efekti.
The phase change on reflection is most relevant to non-dielectric materials such as metals and surfaces that have thin layers of differing materials producing thin-film effects.