Image: HP 5061A Cesium Beam Frequency Standard

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Description: One of the actual cesium beam atomic clock units used in the 1960's "flying clocks" experiment the synchronise time around the world. And later in the Hafele–Keating experiment to prove relativity theory. Currently kept at Agilent (formally Hewlett Packard) Melbourne headquarters.
Title: HP 5061A Cesium Beam Frequency Standard
Credit: Own work
Author: Binarysequence
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes

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