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.
Have you ever seen a small rainbow on a wall in your house or school? This is formed when light is bent (refracted) through a prism (a glass object with flat, polished surfaces). The prism causes the visible light to bend, or refract. The violet light is bent more than the red and yellow light, so the colours separate. These colours-all the colours of the rainbow-make up visible light. Visible light bent (refracted) by a prism (cc) WebExhibits. Newton used a prism to split up light into the colours of the rainbow and project the rainbow onto a wall. To prove that the prism wasn't colouring visible light, he then used another prism to refract, or bend, the light back together again.