2. Table salt. This is the most common kind of salt, and the one most used in the our kitchen. Sourced from salt mines, it is then refined and most minerals removed. Anti-caking agents are added to prevent clumping, as is iodine, a nutrient not always naturally present in salt.
Opaque is from a Latin word meaning dark, and that was its original sense in English, but it now means literally not transparent or metaphorically hard to understand; unclear: Some of his sentences are really opaque..
Opacity (optics) Opacity is the measure of impenetrability to electromagnetic or other kinds of radiation, especially visible light. In radiative transfer, it describes the absorption and scattering of radiation in a medium, such as a plasma, dielectric, shielding material, glass, etc. An opaque object is neither transparent nor translucent. When light strikes an interface between two substances, in general some may be reflected, some absorbed, some scattered, and the rest transmitted. Reflection can be diffuse,