See your GP if you have: 1  persistent or worrying symptoms that could be caused by haemochromatosis â particularly if you have a northern European family background. 2  a parent or sibling with haemochromatosis, even if you don't have symptoms yourself â tests can be done to check if you're at risk of developing problems.
The reflection of light can be roughly categorized into two types of reflection: specular reflection is defined as light reflected from a smooth surface at a definite angle, and diffuse reflection, which is produced by rough surfaces that tend to reflect light in all directions (as illustrated in Figure 1).
1 diffuse scattering When light is reflected off a surface in all directions. 2  dispersion Spreading out of the different wavelengths of light, caused by refraction of light as it passes through a prism. 3  frequency The number of waves produced each second.4  The unit of frequency is hertz, 'Hz'.n the ray diagram: 1  the hatched vertical line on the right represents the mirror. 2  the dashed line is called the normal, drawn at 90Â° to the surface of the mirror. 3  the angle of incidence, i, is the angle between the normal and incident ray. 4  the angle of reflection, r, is the angle between the normal and reflected ray.