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.
There are two important right angle triangles involved in determining the refractive index of a block of glass. A ray of light from the sodium source is the hypotenuse of one right angle triangle (in the air), and the same ray of light forms the hypotenuse of another right angle triangle in the glass.