clock
Washington (AFP) - Einstein's theory of general relativity holds that a massive body like Earth curves space-time, causing time to slow as you approach the object -- so a person on top of a mountain ages a tiny bit faster than someone at sea level. US scientists have now confirmed the theory at the smallest scale ever, demonstrating that clocks tick at different rates when separated by fractions of a millimeter. Jun Ye, of the National Institute of Standards and Technology (NIST) and the University of Colorado Boulder, told AFP their new clock was "by far" the most precise ever built -- and co...
AFP
Washington (AFP) - US scientists have measured Albert Einstein's theory of general relativity -- which holds that gravity slows time down -- at the smallest scale ever, demonstrating that clocks tick at different rates when separated by fractions of a millimeter. Jun Ye, of the National Institute of Standards and Technology (NIST) and the University of Colorado Boulder, told AFP it was "by far" the most precise clock ever built -- and could pave the way for new discoveries in quantum mechanics, the rulebook for the subatomic world. Ye and colleagues published their findings in the prestigious ...
AFP
Washington (AFP) - It would take 15 billion years for the clock that occupies Jun Ye's basement lab at the University of Colorado to lose a second -- about how long the universe has existed. For this invention, the Chinese-American scientist, along with Hidetoshi Katori of Japan, will split $3 million as co-winners of the 2022 Breakthrough Prize in Fundamental Physics. Working independently, the two developed techniques using lasers to trap and cool atoms, then harness their vibrations to drive what are known as "optical lattice clocks," the most precise timekeeping pieces ever built. By compa...
AFP
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