The colors of mother-of-pearl
1917; Elsevier BV; Volume: 183; Issue: 4 Linguagem: Inglês
10.1016/s0016-0032(17)91045-2
ISSN1879-2693
Autores Tópico(s)Cultural Heritage Materials Analysis
Resumo1. Mother-of-pearl owes its colors to two causes (a) Diffraction of light due to a grating-like structure of the terminal edges of successive laminæ. (b) Interference of light due to reflection from numerous parallel laminæ of sensibly equal thickness. 2. By means of “replicas” the study 0f diffraction colors was carried out. Interference measurements were obtained in the infra-red region of the spectrum where conditions are much simplified. From these data the thickness of the laminæ for many different samples was found to lie between the limits 0.4μ and 0.6μ.
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