Brief Guide to the Great Equations

Here are the stories of the ten most popular equations of all time as voted for by readers of Physics World, including - accessibly described here for the first time - the favourite equation of all, Euler''s equation.

Each is an equation that captures with beautiful simplicity what can only be described clumsily in words. Euler''s equation [eip + 1 = 0] was described by respondents as ''the most pr...