At a special angle known as Brewster's angle, no p-polarized light is reflected from the surface, thus all reflected light must be s-polarized, with an electric field perpendicular to the plane of incidence. A simple linear polarizer can be made by tilting a stack of glass plates at Brewster's angle to the beam.
In this particular instance, we would start off by measuring the wound in the length dimension. Where there is the maximum length of this wound of approximately 5.7 centimeters. The width would then be measured at its maximum point of width which is 2.5 centimeters. The depth we then would determine by probing the wound with our cotton-tipped applicator using the cotton end.
Types of Normal Wound Drainage. Serous drainage is clear and may be slightly yellow or colorless in appearance. It is thin and watery and may make a bandage wet without leaving a stain of color. Serous exudate, or discharge, is normal from a wound in the early stages of healing, typically in the first 48-72 hours after the incision is made.