Nicholas writes, "Since Einstein's day, scientists have been trying to directly observe the wave- and particle- aspects of light at the same time. Now, scientists at a Swiss lab have succeeded in capturing the first-ever snapshot of this dual behavior."
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Photosynthesis allows plants to convert light from the Sun into energy, and, in some cases, it does this incredibly well. In fact, certain bacteria can capture 95% of the light that hits them and turn it into useful energy.
Solar panels also convert light from the Sun into energy—but they aren't nearly as good at it. The very best solar panels ever tested in a lab (i.e., not the ones actually available for sale and installation on your house) were able to convert about 34% of the light that hit them into electricity. (Individual experimental solar cells can do better than that. But those are even further away from being incorporated into commercially available panels.)
Why can't we use the Sun's energy as effectively as bacteria can? The secret may be that the bacteria are using quantum physics to transmit energy. It's sort of like the bacteria have a method for keeping boxes of energy from falling off the truck during transport. Read the rest
GOD-MAN commands that you visit the TOM THE DANCING BUG WEBSITE often (at least once a week, unless you have a REALLY good reason, like your football team's in the playoffs); and if you don't follow RUBEN BOLLING on TWITTER, there's no way God-Man's answering your call when you signal him on the special GOD-MAN RADIO WRISTWATCH you received when you joined his Fan Club. (YOU DID JOIN HIS FAN CLUB, DIDN'T YOU?) Read the rest
A couple of years ago our friend Clifford Pickover wrote the terrifically fun book, The Math Book. Now he's got a new one that's just as good about physics. It's called, as you might guess, The Physics Book and the publisher has kindly given me permission to run some examples from the book. You can check all of them out after the jump.
2 Billion B.C.: Prehistoric Nuclear Reactor -- Francis Perrin (1901-1992)
"Creating a nuclear reaction is not simple," write technologists at the U.S. Department of Energy. "In power plants, it involves splitting uranium atoms, and that process releases energy as heat and neutrons that go on to cause other atoms to split. This splitting process is called nuclear fission. In a power plant, sustaining the process of splitting atoms requires the involvement of many scientists and technicians."
In fact, it was not until the late 1930s that physicists Enrico Fermi and Leo Szilard fully appreciated that uranium would be the element capable of sustaining a chain reaction. Szilard and Fermi conducted experiments at Columbia University and discovered significant Neutron (subatomic particle) production with uranium, proving that the chain reaction was possible and enabling nuclear weapons. Szilard wrote on the night of the discovery, "there was very little doubt in my mind that the world was headed for grief."
Because of the complexity of the process, the world was stunned in 1972 when French physicist Francis Perrin discovered that nature had created the world's first nuclear reactor two billion years before humankind, beneath Oklo in Gabon, Africa. Read the rest