If we pronounce Durr in the Hadith Nur to mean pearl, one striking question is: What is the similarity between the Pearl and Peacock as the Hadith Nur worded?
The interpretation of the Arab has been: eloquence of poetic language. This is false since Allah clearly refuted the title of poet for the Prophet peace be upon him.
Iridescence is the commonality between the pearl and peacock (feathers)!
Nur Muhammadi was efficient to collect the Nur from Allah, it used iridescence to authenticate i.e. there is no way to falsify and produce a similar light and finally it had incredible ability to signal from the other world into this world.
Q: What is iridescence?
A: Iridescence (also known as goniochromism) is generally known as the property of certain surfaces which appear to change colour as the angle of view or the angle of illumination changes. Iridescence is often caused by multiple reflections from two or more semi-transparent surfaces in which phase shift and interference of the reflections modulates the incidental light (by amplifying or attenuating some frequencies more than others).
Structural colours: Lustre and colours produced by special regular structures can often be found on birds and insects. The colours depend noticeably on the angle of observation, sometimes they can be seen only within a quite narrow region of the viewing angle.
Structural colours are colours caused by interference effects rather than by pigments. Colour effects are produced when a material is scored with fine parallel lines, formed of one or more parallel thin layers, or otherwise composed of microstructures on the scale of the colour’s wavelength.
Natural Applications:
1. Signaling, living beings use iridescence to send chromatic signals to their surrounding without the expense of developing pigments
2. Collection of light, iridescence used to increase the efficiency of collecting light from dim surrounding:
http://en.wikipedia.org/wiki/Tapetum_lucidum
3. Authentication, iridescence can fashion uniqueness for the object with nearly impossibility to copy:
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