Researchers develop a frequency comb that can untangle the extreme ultraviolet spectrum. Performing atomic, molecular, and optical measurements at high precision requires very precisely calibrated optical equipment.
One method for achieving precision, which won its developers the 2005 Nobel Prize in physics, is known as a frequency comb. These combs create a clear series of evenly-spaced spectral lines that can be put to a variety of uses. Until now, frequency combs have been confined to visible light frequencies, but new developments have extended their usefulness into the extreme ultraviolet portion of the spectrum. Quantum Entanglement and Information (Stanford Encyclopedia of Philosophy) - StumbleUpon.
First published Mon Aug 13, 2001; substantive revision Thu Aug 26, 2010 Quantum entanglement is a physical resource, like energy, associated with the peculiar nonclassical correlations that are possible between separated quantum systems.
Entanglement can be measured, transformed, and purified.
CompSci. Meaning of Halflife - StumbleUpon. I'd like to illustrate what this really means.
If living creatures had halflives the way radioactive atoms do, the world would be a very different place. What do you mean? Suppose there's an alien species with a halflife of, say, 70 years. You randomly pick out 16 baby aliens and track them to see how long they live. After 70 years, of course, 8 of them will still be alive.