Tag Archives: SI units
The strange beauty of Planck units
What does it mean to say that the speed of light is 1? We know the speed of light in the vacuum of space to be 299,792,458 m/s – or about 300,000 km/s. It’s a quantity of speed that’s very … Continue reading
Posted in Analysis, Scicomm
Tagged Boltzmann constant, Hagedorn temperature, Planck constant, Planck scale, Planck temperature, Planck units, quantum gravity, SI units, speed of light
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The clocks that used atoms and black holes to stay in sync
You’re familiar with clocks. There’s probably one if you look up just a little, at the upper corner of your laptop or smartphone screen, showing you what time of day it is, allowing you to quickly grasp the number of … Continue reading
Posted in Scicomm
Tagged atomic clocks, caesium standard, caesium-133, Event Horizon Telescope, frequency comb, hydrogen maser, International Celestial Reference Frame, Kashima, Koganei, Medicine, microwave clocks, Milky Way, optical atomic clocks, quasars, radio telescopes, SI units, strontium clock, uncertainty, Very-Long Baseline Interferometry, VLBI, ytterbium clock
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