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.
When the two refractive indices are equal (n(1) = n(2)), then the light is passed through without refraction. The concept of refractive index is illustrated in Figure 1 below, focusing on the case of light passing from air through both glass and water.