Twitter: Adam M. Augustyn, Manager at Encyclopaedia Britannica;

Article Update: Speed of light – https://www.britannica.com/science/speed-of-light

January 15, 2020 @AdamMAugustyn Did you know that Max Planck’s 1899 simple formula for Planck Time, “Planck Length divided by Planck Time equals the speed of light” actually works! https://81018.com/c/ (the formulas). Long before the laboratory confirmation (1975), he was within .1%! Amazing, no?

Mathematical physics + ArXiv