The clocks that changed time | How long is a piece of string | Helen Margolis скачать в хорошем качестве

The clocks that changed time | How long is a piece of string | Helen Margolis

NPL Fellow Helen Margolis journeys through the evolution of timekeeping; from sundials and pendulums to quartz crystals and the revolutionary atomic clock. Discover how Louis Essen’s 1955 groundbreaking work, conducted right here at NPL, redefined the second, transforming modern life. #AtomicClock #Timekeeping #ScienceHistory #NPL #HelenMargolis Image credits: Ration book: The National Archives, UK (Wikimedia Commons, public domain) Churchill: Yousuf Karsh. Library and Archives Canada, e010751643 (Wikimedia Commons, licensed under the  Creative Commons Attribution 2.0 Generic license) UMG Recordings, Inc. Record: (Wikimedia Commons, public domain) Heathrow airport arial: The National Archives, UK (Wikimedia Commons, public domain) ITV launch Evert F. Baumgardner – National Archives and Records Administration (Wikimedia Commons, Creative Commons ) CC0 1.0 Universal Public Domain Dedication) Horas non numero: Aldeburgh – 2013 by Helmut Zozmann (Creative Commons Attribution-Share Alike 2.0 Generic license) Stonehenge: Image by Walkerssk from Pixabay Water clock: Maahmaah,(Wikimedia Commons, Creative Commons  Attribution-Share Alike 3.0 Unported license) Candle clock: de:Benutzer:Flyout (Wikimedia Commons, Creative Commons  Attribution-Share Alike 3.0 Unported license) Hourglass: John Morgan, (Wikimedia Commons,  Creative Commons Attribution 2.0 Generic license) Pendulum clocks: Ivan2010, (Wikimedia Commons, Creative Commons Attribution 3.0 Unported license) Rotating earth: RPXStudio Pixabay Quartz clock: Edvaldo LL Souza, Wikimedia Commons, Creative Commons Attribution-Share Alike 4.0 International  Tuning fork: Mister rf, Wikimedia Commons,  Creative Commons Attribution-Share Alike 4.0 International United States Naval Observatory: US Naval Observatory, public domain , Wikimedia Commons) Royal Observatory Greenwich: Tilman2007 / Creative Commons Attribution-Share Alike 3.0 Unported (Wikimedia Commons) Einstein: Photograph by Oren Jack Turner, Princeton, N.J. / United States  Library of Congress's Prints and Photographs division / Wikimedia Commons (public domain)