what are 5 applications of radiation of heat
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2. Radiators of heat in cars, machines and air conditioners are painted black so as to have cooling effect by radiating most heat.
3. Room (electric) heaters have bright polished surfaces which act as good reflectors of heat. Such surfaces absorb very little heat and reflect towards us most of the heat radiations. These surfaces remain cool even after continuous use of heaters. The highly polished surfaces of spacecraft reflect most of the heat radiated from the sun.
4. Base of cooking utensils is made black. Such a black surface absorbs more heat from the surroundings. This is because conduction, convection and radiation of heat are minimum.
1. We wear white or light-coloured clothes in summer because they are poor absorbers and good reflectors of heat. This way they keep us cool. On the contrary, we prefer to wear dark-coloured clothes in winters because they absorb most of the heat of sun and keep our body warm.
2. Radiators of heat in cars, machines and air conditioners are painted black so as to have cooling effect by radiating most heat.
3. Room (electric) heaters have bright polished surfaces which act as good reflectors of heat. Such surfaces absorb very little heat and reflect towards us most of the heat radiations. These surfaces remain cool even after continuous use of heaters. The highly polished surfaces of spacecraft reflect most of the heat radiated from the sun.
4. Base of cooking utensils is made black. Such a black surface absorbs more heat from the surroundings. This is because conduction, convection and radiation of heat are minimum.
5.The cooling fins at the back of our refrigerator need to radiate its heat quickly to the surroundings.Its surface is made rough and painted black.
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