Engineering
Windows welcome light into interior spaces, but they also bring in unwanted heat. A new window coating blocks heat-generating ultraviolet and infrared light and lets through visible light, regardless of the sun's angle. The ...
Apr 2, 2024
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Energy & Green Tech
Discarded crisp bags, ketchup bottles and Tupperware containers speed along conveyer belts at a massive high-tech sorting plant dubbed "Site Zero", which Sweden hopes will revolutionize its plastic recycling.
Mar 27, 2024
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Infrared (IR) radiation is electromagnetic radiation whose wavelength is longer than that of visible light (400-700 nm), but shorter than that of terahertz radiation (100 µm - 1 mm) and microwaves (~30,000 µm). Infrared radiation spans roughly three orders of magnitude (750 nm and 100 µm).
Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux, which includes infrared (47% share of the spectrum), visible (46%), and ultra-violet (only 6%) light. Bright sunlight provides luminance of approximately 100,000 candela per square meter at the Earth's surface.
This text uses material from Wikipedia, licensed under CC BY-SA
