Sentences with phrase «driven pendulum clocks»

From that moment on, weight - driven pendulum clocks struck the hour at the same intervals, whether in winter or summer, spring or fall, day or night.

Not exact matches

By constantly tuning the laser to drive that aluminum transition, an interaction that only occurs in a tiny window near 1.121 petahertz (1.121 quadrillion cycles per second), the laser's frequency can be stabilized to an exquisitely sensitive degree, allowing it to act as the clock's pendulum.