Template:Are You Sure/February 1

• ... that physicist and academic Werner Heisenberg (5 December 1901 – 1 February 1976) introduced the uncertainty principle — a principle in quantum mechanics which may be expressed by any of a variety of mathematical inequalities asserting a fundamental limit to the precision with which certain pairs of physical properties of a particle can be known?

• ... that physicist and mathematician Sir George Stokes, 1st Baronet (nonfiction) (13 August 1819 – 1 February 1903) made pioneering contributions to fluid dynamics (including the Navier–Stokes equations) and to physical optics?