### Possible Answer

A numerical coefficient would then be included to create the Bethe–Feynman formula—increasing accuracy more than an order of magnitude. [3] See also - read more

... (including the Bethe-Feynman formula) ... Citation: Alex Wellerstein, "Feynman and the Bomb," Restricted Data: The Nuclear Secrecy Blog, June 6, 2014, ... - read more

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