Infrared radiation is a type of electromagnetic radiation that has a longer wavelength than visible light. It is not visible to the human eye, but can be felt as heat.
Yes, plain glass does reflect infrared radiation. However, the amount of reflection depends on the type of glass and its thickness. Generally, thicker and darker glass will reflect more infrared radiation than thinner and lighter glass.
Plain glass reflects infrared radiation through a process called specular reflection. This means that the surface of the glass is smooth and flat, causing the infrared radiation to bounce off at the same angle that it hits the glass.
No, plain glass is not a good insulator against infrared radiation. While it does reflect some of the radiation, it also allows a significant amount to pass through. This is why glass windows can still feel warm to the touch on a sunny day.
Yes, plain glass can be coated with a special material that increases its ability to reflect infrared radiation. This is often done in buildings to improve energy efficiency and reduce heat transfer through windows.