Atomic Clock is a photograph by Adam Hart-davis/science Photo Library which was uploaded on September 15th, 2018.
Atomic Clock
Atomic clock. Atomic clocks use an 'atomic fountain' to measure the exact length of a second. The fountain contains atoms that oscillate between two... more
Title
Atomic Clock
Artist
Adam Hart-davis/science Photo Library
Medium
Photograph
Description
Atomic clock. Atomic clocks use an 'atomic fountain' to measure the exact length of a second. The fountain contains atoms that oscillate between two energy levels at high speed. Counting these oscillations is the basis for the standard second. The current basis for the international definition of time is the caesium atomic clock, where one second is defined as 9,192,631,770 oscillations of caesium-133 atoms. This atomic clock is used at Hat Creek Radio Observatory, California, USA, to synchronise the Allen Telescope Array (ATA). The ATA is an array of 350 telescope antennas, which (when completed in 2008) will be one of the largest and most powerful telescopes in the world.
Uploaded
September 15th, 2018
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