What is another word for optical opacity?
Pronunciation: [ˈɒptɪkə͡l ɒpˈasɪti] (IPA) 
Optical opacity refers to the characteristic of being impenetrable to light. There are several synonyms that can be used to express the same meaning. These include opacity, opaqueness, darkness, obscurity, and cloudiness. On the other hand, antonyms for optical opacity include transparency, translucency, clarity, and brightness. The use of synonyms allows for variation in language, making the text more interesting to read. Regardless of the word used, the concept remains the same, which is that the object or material is not allowing light to pass through it, resulting in an opaque or dark appearance.
