CentralNotice Coriolis effect From Wikipedia, the free encyclopedia Jump to: navigation , search For the psychophysical perception effect, see Coriolis effect (perception) . In the inertial frame of reference (upper part of the picture), the black ball moves in a straight line. However, the observer (red dot) who is standing in the rotating/non-inertial frame of reference (lower part of the picture) sees the object as following a curved path due to the Coriolis and centrifugal forces present in this frame. In physics , the Coriolis effect is a deflection of moving objects when they are viewed in a rotating reference frame . In a reference frame with clockwise rotation, the deflection is to the left of the motion of the object; in one with counter-clockwise rotation, the deflection is to the right. Although recognized previously by others, the mathematical expression ...