light Archives – The Green Optimistic green tech news, since 2008 Tue, 17 Jul 2018 06:01:25 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 2667534 Using Light To Clean Nuclear Waste https://www.greenoptimistic.com/light-clean-nuclear-waste-20180715/ https://www.greenoptimistic.com/light-clean-nuclear-waste-20180715/#respond Tue, 17 Jul 2018 06:01:25 +0000 https://www.greenoptimistic.com/?p=66019 A Florida State University research team found a unique way to separate metal ions. This process could help to purify water or even recycle nuclear waste. They decided to use a simple, widely available energy source – Light. Postdoctoral researcher Sahan Salpage and Assistant Professor of Chemistry and Biochemistry Kenneth Hanson described their strategy in […]

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]]> https://www.greenoptimistic.com/light-clean-nuclear-waste-20180715/feed/ 0 66019 Treating Heat Just Like Light Yields New Thermoelectric Applications https://www.greenoptimistic.com/treating-heat-just-like-light-yields-new-thermoelectric-applications-20130111/ https://www.greenoptimistic.com/treating-heat-just-like-light-yields-new-thermoelectric-applications-20130111/#respond Fri, 11 Jan 2013 19:15:25 +0000 https://www.greenoptimistic.com/?p=31208 New research coming from MIT’s Department of Materials science and engineering, reveals a technique that allows manipulation of heat so that it can be controlled as light waves. The author, Martin Maldovan, a researcher at the institute, engineered materials that consist of nanostructured semiconductor alloy crystals. Considering that heat is basically a vibration of matter, […]

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]]> https://www.greenoptimistic.com/treating-heat-just-like-light-yields-new-thermoelectric-applications-20130111/feed/ 0 31208 Very Efficient and Dimmable Compact Fluorescent Light Bulbs https://www.greenoptimistic.com/very-efficient-and-dimmable-compact-fluorescent-light-bulbs-20090414/ https://www.greenoptimistic.com/very-efficient-and-dimmable-compact-fluorescent-light-bulbs-20090414/#comments Tue, 14 Apr 2009 19:37:08 +0000 https://www.greenoptimistic.com/?p=3375 Most of us still use today the traditional incandescent light bulbs to light our homes. But as the traditional light bulbs have a high energy consumption, most turn nowadays to compact fluorescent light bulbs(CFLs).

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]]> https://www.greenoptimistic.com/very-efficient-and-dimmable-compact-fluorescent-light-bulbs-20090414/feed/ 8 3375 Why is the natural light dimming? https://www.greenoptimistic.com/why-is-the-natural-light-dimming-20080129/ https://www.greenoptimistic.com/why-is-the-natural-light-dimming-20080129/#respond Tue, 29 Jan 2008 13:40:56 +0000 https://www.greenoptimistic.com/index.php/2008/01/29/why-is-the-natural-light-dimming/ Global dimming is the gradual reduction in the amount of global direct irradiance at the Earth’s surface that was observed for several decades after the start of systematic measurements in 1950s. It is thought to have been caused by an increase in particulates such as sulfur aerosols in the atmosphere due to human action. The […]

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