Dryness in the mouth can also be due to a change in the composition of saliva or reduced salivary flow in the mouth. Medically, dry mouth is also known as xerostomia. There are a few home remedies to prevent dry mouth. These dry mouth home remedies need to be used on a daily basis to help ward off the problem. Pregnant women and the elderly too face dry mouth along with bad breath. This too can be treated with the home remedies. Take a look.
If you heat the glass uniformly and quench the glass uniformly, you have no iridescence. However, that is only theoretical with heat-treated tempered glass. People tend to think that iridescence is caused only by the quench. Surprisingly, the worst iridescence examples usually are caused in the heating section.
In both cases the angle of incidence equals the angle of reflection at the point that the light ray strikes the surface. Light is also reflected when it is incident on a surface or interface between two different materials such as the surface between air and water, or glass and water.Each time a ray of light strikes a boundary between two materials-air/glass or glass/water-some of the light is reflected. Light reflected from a metal surface with angle of incidence i equal to the angle of reflection i'. The dashed line (normal) is perpendicular to the surface. Figure. 2 Light reflection from a) smooth surface (specular reflection) and b) rough surface (diffuse reflection).