A newly measured value of an electron’s magnetic moment 1 — a property of its spin and charge — is twice as precise as the one physicists have used for the past 14 years.

Credit: Sonnet Malakaran George/Alamy An analysis of the jumps of a hydrogen atom’s electron has yielded a new, precise value for the Rydberg constant, a fundamental quantity in physics 1.

Its precise value is determined by how well the stone is cut, its colour, its size (also called its “carat”) and whether it contains flaws. The clearer, heavier, closer to colourless and more ...

However, a professor of mathematics and fellow legislator proved him wrong in front of Congress and scuttled the bill. Archimedes used a 96-sided polygon to calculate his most precise value of pi.