NHS fetal anomaly screening programme (FASP) and Population screening programmes. Read an overview of the NHS fetal anomaly screening programme (FASP), and learn how to contact the programme.
These small solid particles cause the liquid to appear turbid. Turbidity (or haze) is also applied to transparent solids such as glass or plastic. In plastic production haze is defined as the percentage of light that is deflected more than 2.5Â° from the incoming light direction.
Turbidity analysis is an optical measurement of scattered light. When light is passed through a water sample, particles in the light path change the direction of the light, scattering it. If the turbidity is low, most of the light will continue in the original direction.