1 You have signs of infection, such as: 2  Increased pain, swelling, warmth, or redness around the bite. 3  Red streaks leading from the bite. 4  Pus draining from the bite.  A fever.
A negative index of refraction due to three-dimensional chirality is demonstrated for abilayered metamaterial based on pairs of mutually twisted planar metal patterns in parallel planes, which alsoshows negative electric and magnetic responses and exceptionally strong optical activity and circular dichro-ism.
Refractive Index (n). The refractive index (n) of a material is the ratio of the speed of light (c) in a vacuum to the velocity of light in the material (cS). The refractive index of a material is always greater than 1.For example; water = 1.33.diamond = 2.42. glass = 1.5. air Â» 1. When a ray of light goes from material (1) into material (2), rather than from a vacuum into a material we talk about the relative refractive index.or example; water = 1.33. diamond = 2.42. glass = 1.5. air Â» 1. When a ray of light goes from material (1) into material (2), rather than from a vacuum into a material we talk about the relative refractive index.