And also the refractive index of the dielectric material is closely related to arrangement of ions, isotropic material, such as amorphous (amorphous body), and when the cubic crystal propanediol, only one refractive index. And when the light enters the non-homogeneous media, generally have divided into mutually perpendicular vibration directions, ranging from two-wave propagation velocity, respectively, there are two refracted light, a so-called birefringence. These two refracted light, parallel to the plane of incidence of light refractive factory outlets glycol, often called the refractive index, regardless of how changes in the angle of incidence of the incident light, it is always a constant, obey the law of refraction. Another refractive index perpendicular to the light incident surface constituted, with the direction of incident light changes, called extraordinary light refractive index, it does not comply with the law of refraction. When the incident light along the optical axis of the crystal propylene price quotes, only the presence of Jinan glycol, with the optical axis perpendicular to the incident, up to the maximum value of the characteristics of this material. In summary, the crystal along the direction of greater bulk density greater extent. Negative refractive Editor's note: the following content for the staff would like to relevant departments, related majors and related lovers reference, the general public can not do in-depth understanding of this. Negative refractive index (permittivity and negative permeability simultaneously) problem is very active in recent years, an international field of research. When the electromagnetic wave propagation in the negative refractive index materials, the electric field E, the magnetic field B and wave vector k constitute the three left-handed helix, and so, also known as negative refractive index material left-handed material (left-handed materials). Veselago 1968 was first conceived in the theory of left-handed material .Pendry in 1996 and 1999, respectively, indicating that you can use a thin metal wires and a seam ring resonator array structure permittivity ε and permeability μ while negative artificial media. Occurred in 2001, Smith et al.'s Method followed Pendry constructed the permittivity and negative permeability simultaneously artificial medium, and the first experimental observation of the microwave band of the electromagnetic wave through this artificial medium and air interface The negative refraction. Despite the early people on Smith et al. Experiments have many arguments, but more careful experiments since 2003 have confirmed the negative refraction. Propylene glycol uses, Jining glycol, Xiang Xiang dry chemical provided by the Jinan Chemical Co. dry. Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) strong, credible, in Jinan, Shandong alcohol industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Xiang dry chemical into the brilliant and you work for a better future!