Subject: White paint reflects heat, black absorbs but black car engine block runs cooler Category: Science Asked by: fillw-ga List Price: $4.00.
http://answers.google.com/answers/threadview/id/711843.html
Hypothesis. When a color (colored fabric) absorbs light, it turns the light into thermal energy (heat). The more light a color absorbs, the more thermal energy it produces. Black fabric absorbs all colors of light and is therefore warmer than white fabric which reflects all colors.
http://www.colormatters.com/color-and-heat-absorption
White reflects most of the energy falling from the visible spectrum, black absorbs it. When the energy of light is absorbed it turns into heat. Any material painted black will absorb this heat further and its temperature will be raised but it will depend on the material how far the heat is transferred.
http://physics.stackexchange.com/questions/122911/black-and-white-matters-but-why-and-how
A white (or at least light-colored) roof provides two benefits. The first is reduced air conditioning costs, which can drop 15 to 20 percent. The second benefit is more cosmic. A lighter-colored roof will reflect as much as 80 percent of the solar radiation that hits your house back into space. This increases the albedo (reflectivity) of the planet, which could help reduce global warming-surely a worthwhile goal for any home improvement project.
http://www.connectsavannah.com/savannah/how-much-can-a-white-roof-help-reflect-heat/Content?oid=2132782
A perfectly black object absorbs all incoming visible radiation, while a perfectly white object reflects all incoming visible radiation. As there is no such thing as a perfectly black or perfectly white object, all objects absorb incoming visible radiation to some extent.
http://physics.stackexchange.com/questions/122911/black-and-white-matters-but-why-and-how
Answer 1: Click Here to return to the search form. When an object appears a certain color when illuminated by white light it means that it is reflecting light of that color and absorbing all other colors. For example, a red apple is reflecting red light and absorbing all other colors of light. The more light the object absorbs, the more heat absorbed since light is energy. If you consider it a color, black absorbs the most heat. A black object absorbs all wavelengths of light and reflects none. Objects that are white, on the other hand, reflect all wavelengths of light and therefore absorb the least heat.
http://scienceline.ucsb.edu/getkey.php?key=1464
I know black conducts heat while white reflects it. Black objects don't conduct heat. Black objects absorb incoming radiation in the visible range. Similarly, white objects don't reflect heat. They diffusely reflect incoming visible radiation. But they are colors after all. Yes and no. Whether black or white are colors depends very much on what you mean by color.
http://physics.stackexchange.com/questions/122911/black-and-white-matters-but-why-and-how
Rain helps, but over time your roof is going to accumulate tree sap, bird poop, and other species of urban crud, and you'll have to clean it off to maintain energy savings. One study found on average a white roof can lose 20 percent of its heat reflectivity in just a year. A cooler roof also means your house soaks up less sunlight in the winter, resulting in higher heating bills.
http://www.connectsavannah.com/savannah/how-much-can-a-white-roof-help-reflect-heat/Content?oid=2132782
All the other visible colors are absorbed. If the object reflects a warm color (red, orange, yellow) it will be cooler than an object which absorbs them. For example, if you shine light on a blue object, it will absorb the warm red light, and will be warmer than a red object which would reflect that light.
http://www.colormatters.com/color-and-heat-absorption
According to Lawrence Berkeley Laboratories, white-coated roofs can reflect 60 to 85 percent of the solar energy that hits them and stay as little as nine degrees above air temperature. Dark-colored roofs, by contrast, typically reflect 20 percent of sunlight or less, and a black asphalt roof reflects only 5 percent.
http://www.connectsavannah.com/savannah/how-much-can-a-white-roof-help-reflect-heat/Content?oid=2132782
does white absorb or reflect heat
White color reflects the heat. White reflects heat.