optical properties of materials

Although a colloidal solution appears to be homogenous because the dispersed particles are too small too be seen, it can be distinguished from a true solution by its ability to scatter light. The scattering of light by colloidal sized particles is called the Tyndall effect. This effect was first o..

Michael Faraday discovered that a specimen of bismuth was repelled by a strong magnet. Diamagnetism occurs in all materials. These materials are those in which individual atoms do not possess any net magnetic momen..

Matter and Materials - Matter exists in several phases. If we look at all objects around us, we perceive that some materials have a definite shape and occupy a definite amount of space or volume. We call these materials solids and we can name many objects that are soli..

(e.g., TiO 2 , NaCl, C 6 H 6 ) are weakly repelled by external magnetic fields. This property is shown only by those substances which contain fully-filled orbitals i.e., no unpaired electrons is presen..

) Low transmission losses, as low as 0.1 db/km. (iii) Immunity to electromagnetic interference, which is an inherent characteristic of an optical fiber viewed as a dielectric wave guide. (iv) Small size and weight, characterized by a diameter, which is no greater than that of a human hair..

. Some of the important applications of total internal reflection are brilliance of diamond, totally reflecting glass prisms, optical fibres, mirage (false appearance of water in deserts in hot summer season) etc., A surface, which forms a part of a sphere of transparent refracting m..

Polyethylene has a low softening point of 383K and a low specific gravity of 0.22. The material is tough flexible highly insulating water resistin..

50% Anti-corrosion agent 6% Optical brightener 0.3% Water and inorganic filler 19.7% Tripolyphosphate can produce hydroxyl ions by reacting with water. It keeps the wash water slightly alkaline, to emulsify grease particles. They can also tie up calcium and magnesium ion..

The branch of physics dealing with the study of optical phenomena is called optics. This can be divided into two categories, ray optics and wave optics. Wave optics describes the connection between waves and rays of light. The wave theory of light w..

Neoprene is superior to natural rubber because of the following properties: Neoprene is non-inflammable but natural rubber is inflammable Neoprene is resistant to oils, organic solvents, petrol and grease. Natural rubber swells and rots in contact with these materials N..