Any motion which repeats itself at regular intervals of time is known as periodic motion. If a body moves back and forth repeatedly about its mean position then it is said to be in oscillatory motion.

Neutrino monitor: artist’s impression of the STEREO experiment at ILL showing the six identical detectors (centre) located next to the reactor core (right). (Courtesy: Loris Scola/CEA) Data from an ...

Flow velocity in the fuel/oxidizer injectors and combustion chamber during combustion oscillations in a model of a rocket engine. (Courtesy: Hiroshi Gotoda) Researchers in Japan have identified a ...