give the reason for formation of opalescence
Answers
Answer:
In a physical sense, some cases of opalescence could be related to a type of dichroism seen in highly dispersed systems with little opacity. Due to Rayleigh scattering, a transparent material appears yellowish-red in transmitted white light and blue in the scattered light perpendicular to the transmitted light.
Explanation:
In a physical sense, some cases of opalescence could be related to a type of dichroism seen in highly dispersed systems with little opacity. Due to Rayleigh scattering, a transparent material appears yellowish-red in transmitted white light and blue in the scattered light perpendicular to the transmitted light.The phenomenon illustrated in the bottom photo is an example of the Tyndall effect.
Precious Opal. The general definition of opalescent is a milky iridescence displayed by an opal which describes the visual effect of precious opal very well, and opalescence is commonly used in lay terms as a synonym for iridescence.[5]
Common Opal. In contrast, common opal does not display an iridescence but often exhibits a hazy sheen of light from within the stone—the phenomenon that gemologists define strictly as opalescence.[6] This milky sheen displayed by opal is a form of adularescence.[4]
Fire Opal is a relatively transparent gemstone with a vivid yellow-orange-red color and rarely displays iridescence.[2]