cesium

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  • The Franklin Institute / Smithsonian Open Access

    Smithsonian opens up 2.8 million images to the public

    by 
    Christine Fisher
    Christine Fisher
    02.25.2020

    The Smithsonian Institution is releasing a whopping 2.8 million high-res, two- and three-dimensional images from its collections to a new Open Access online platform. The material comes from all 19 Smithsonian museums, nine research centers, libraries, archives and the National Zoo, and it's available for free to anyone with a web browser.

  • Scientists eye secure communications by slowing down light

    by 
    Timothy J. Seppala
    Timothy J. Seppala
    04.09.2015

    We've already seen what fiber optics can do for internet speeds, and it looks like the medium could be used for quantum communications too. See, as EurekAlert tells it, scientists from the Vienna University of Technology have figured out a way to modify the material so it can be used to control the speed of light. The researchers successfully grafted cesium atoms to the fibers, allowing them to slow light down from its typical 671 million MPH pace to around 112 MPH (180 KPH). The researchers were able to bring the light to a complete stop and then restart it later, too -- something EurekAlert says in a pretty major step toward quantum internet. It'd be much more secure than what we have currently as well, given that professor Arno Rauschenbeutel says that quantum physics at its very core allows for a connection between sender and receiver and anyone tapping in won't go unnoticed. [Image credit: Shutterstock]

  • New developments in atomic clock technology beat accuracy records, may inspire Ke$ha's next hit

    by 
    Lydia Leavitt
    Lydia Leavitt
    08.29.2011

    According to a recent Penn State study that uses a new way to calculate time-telling precision, the CsF2 cesium-based atomic clock at the UK's National Physical Laboratory is almost twice as accurate as originally thought -- meaning it will only gain or lose one single second over the course of 138 million years. This atomic clock isn't the only competitor for best-in-show, as researchers at the University of Tokyo have also announced a new record, claiming their optical lattice atomic clock observes atoms a million times faster than a traditional atomic clock -- achieving accuracy up to 18 digits in a one second measurement. Although researchers say the technology would gain or lose a second significantly faster than the cesium-based variety (31.7 million years), it could change the way scientists perceive time and space, giving us new insights into fundamental constants of physics. "Until now, clocks have been thought of as tools for sharing common time. But with clocks like this, conversely, we can understand that time passes at different speeds, depending on the time and place a clock is at," said Hidetoshi Katori of the University of Tokyo. Of course, both atomic clocks can help us stay timely, but they also have practical applications for everything from deep-space networking, to predicting earthquakes and GPS navigation. With this type of accuracy, looks like none of us will be getting away with showing up late to work anymore. Check out a video about the optical lattice clock after the break.