Light in Reverse Gear I

The purpose of this AV Column is to describe a physical paradox involving what seems to be an loophole in a well established physical law, the famous Second Law of Thermodynamics. The 2nd Law states that the amount of disorder (entropy) always either increases or remains constant for any isolated system of particles, whether they are gas molecules or light photons. An yet, as we will see, laser physicists seem to have provided us with a way of making the 2nd Law work backwards for a system of photons, so that the disorder decreases.
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