Yvonne Carts-Powell

Posts Tagged ‘light’

Nobels Make a Great Year for Light

In beautiful, Science, technology on November 25, 2014 at 8:17 pm

Wow, what an excellent year for researchers in light, with two Nobel Prizes firmly in the optics regime. In Physics, Isamu Akasaki, Hiroshi Amano and Shuji Nakamura won “for the invention of efficient blue light-emitting diodes which has enabled bright and energy-saving white light sources”. Those LED lightbulbs you are starting to see at reasonable prices at Home Depot? The ones that work even more efficiently than Compact Fluorescents (and without the wait to turn on in cold weather, or the ballast’s buzz, or the cold tint)? You can thank Nakamura for those, among other things.

And in Chemistry, Eric Betzig, Stefan W. Hell, and William E. Moerner all won “for the development of super-resolved fluorescence microscopy”. In other words, we can now see things the size of molecules, we can see things smaller than half the wavelength of light. (Besides the developments being astonishing and immediately useful, as a journalist I have had a lot of fun watching the horse race between the labs at the Max Planck Institute for Biophysical Chemistry and Stanford University.)

The editor of Applied Physics Letters explains a little more about both achievements: Editorial: Nobel Prizes honor ground-breaking innovations in applied science. The journal is also providing free copies of seminal and recent papers by the researchers: papers by the researchers in APL.


Fish hide inside their skin

In beautiful, Science, writing on October 24, 2012 at 1:11 pm

Usually reflective surfaces change the polarization of light in a predictable way, and some aquatic predators use that property to look for food. But fish skin is complex enough that reflected light isn’t clearly polarized, and thus the fish are less visible and less likely to end up as lunch.

Fish skin structure explains biological cloaking.

By the way, coverage of this story has includes ridiculous (“rubbish” as my English editor says) claims that the fish skin breaks the laws of physics. I can only assume that the writer was overenthusiastic and untutored in science. The article linked here claims “biological cloaking” which also seems like a bit of a stretch. What is really going on with the fish skin is that it is camouflaged in ways that we can’t see with human eyes.

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