How close to invisible can a mirror be?

(Phys.org)—In 2011, mathematicians Alexander Plakhov and Vera Roshchina proved that objects with mirror surfaces cannot be perfectly invisible. Now in a new study, Plakhov has returned to the problem, asking just how close ...

Researchers develop flexible, stretchable photonic devices

Researchers at MIT and several other institutions have developed a method for making photonic devices—similar to electronic devices but based on light rather than electricity—that can bend and stretch without damage. ...

Exotic quantum states made from light

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are sufficiently concentrated and cooled. The individual particles ...

Economist suggests humans are still evolving

(Phys.org)—Harvard economist Jonathan Beauchamp has conducted a study of lifetime reproductive success (rLRS) of a small segment of the U.S. population and has concluded that there is evidence that humans are still evolving. ...

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