News tagged with visible light

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The difficulties of cataloging dark nebulae

E. E. Barnard is an astronomer perhaps best known for measuring the proper motion of a faint red dwarf about six light years away, now known as Barnard's star. But Barnard was also a pioneer of astrophotography, ...

dateOct 06, 2014 in Astronomy
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A nanosized hydrogen generator

(Phys.org) —Researchers at the US Department of Energy's (DOE) Argonne National Laboratory have created a small scale "hydrogen generator" that uses light and a two-dimensional graphene platform to boost ...

dateSep 20, 2014 in Nanophysics
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Ray tracing and beyond

Ray tracing is simple to explain at one level: "We all do it all day long: That's how you navigate the world visually," Gene Tracy explains. "The fact that I know that you're sitting there and not over there is because the ...

dateSep 01, 2014 in Plasma Physics
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Smartphone radiation detector app tests positive

The popularity of smartphones continues to grow with the availability of an ever-growing range of applications. The app, Radioactivity Counter, is designed to measure a person's exposure to radiation. It claims ...

dateJun 30, 2014 in Software
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A better imager for identifying tumors

Before they excise a tumor, surgeons need to determine exactly where the cancerous cells lie. Now, research published today in The Optical Society's (OSA) journal Optics Letters details a new technique that c ...

dateJun 19, 2014 in Optics & Photonics
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