Most people notice them in well-lit rooms or outdoors on a bright day. Often floaters are normal, but sometimes they're a sign of a more serious eye problem, such as retinal detachment, especially if you also see light flashes or a dark shadow come across the edge of your vision.
A Composite material (also called a composition material or shortened to composite, which is the common name) is a material made from two or more constituent materials with significantly different physical or chemical properties that, when combined, produce a material with characteristics different from the individual components.
Pure and impure chemical substances. A pure element or compound contains only one substance, with no other substances mixed in. Impure materials may be mixtures of elements, mixtures of compounds, or mixtures of elements and compounds. 1  1.2  2. 3  3.4  4. 5  5.ure and impure chemical substances. A pure element or compound contains only one substance, with no other substances mixed in. Impure materials may be mixtures of elements, mixtures of compounds, or mixtures of elements and compounds. 1  1. 2  2. 3  3. 4  4. 5  5.