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Prevalence and risk factors of inflammatory acne vulgaris in rural and urban Ghanaian schoolchildren
Author(s) -
Hogewoning A.A.,
Koelemij I.,
Amoah A.S.,
Bouwes Bavinck J.N.,
Aryeetey Y.,
Hartgers F.,
Yazdanbakhsh M.,
Willemze R.,
Boakye D.A.,
Lavrijsen A.P.M.
Publication year - 2009
Publication title -
british journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.304
H-Index - 179
eISSN - 1365-2133
pISSN - 0007-0963
DOI - 10.1111/j.1365-2133.2009.09259.x
Subject(s) - medicine , library science , sociology , dermatology , computer science
transmitted component of each re-emitted state has its own random refractive index-induced retardance (retardance is the slowing of light due to the refractive index of the structure the light is penetrating). For each colour, the interference of the selectively transmitted states, which is due to their randomized retardances, may be either constructive (which enhances the colour) or destructive (which diminishes the colour). This produces ‘interference colours’, in a process similar to that in birds’ feathers such as, for example, the peacock. Thus, all of these complex effects in combination probably produce the colours of the ‘rainbow’. Hence, the rainbow pattern is probably a luminescence phenomenon related to light in different states of polarization interacting with the superficial and ⁄or deep structural components within the lesion. Each state of polarization will suffer varying absorption and retardance, resulting in a combination of absorbance-induced and interference-induced colour. Further in-depth research is necessary in order to understand the underlying optics for such ‘rainbows’ and to assess the possible diagnostic significance.