👉 Insolation is a concept in physics that describes the amount of light, heat, or other energy emitted by a body due to its surroundings. It is used to describe how much light or heat a body absorbs from its environment. In isolation, the term "insolation" refers to the absence of any sources of illumination or heat. This can occur in various environments such as indoors where there is no visible light source, outdoors when there are no other sources of heat or light, or even in space