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Why the clock's hands moved from left to right
- Mar 07, 2017 -

Mechanical watch dial from the Sundial, sundials are humans the first tool to measure the time interval. The simplest Sundial is inserted in the Sun of a sharp knife on a plane, the plane, from knife shadows cast by said the length and direction of the shadow is in a State of flux.
In the northern hemisphere, Sundial, dating back to 4000 BC. If the Sun is in the East, the shadow toward the West, and vice versa. Therefore, the shadow moves from West to East during the day. That is, the shadow for the observer towards the North in a clockwise direction. In a mechanical watch, late 15th century introduced the motion of a pointer in the northern hemisphere in the past or present Sundial sports. In the southern hemisphere, sundial's shadow was moving from East to West. If clock originated in the southern hemisphere, then the pointer will move in a counter-clockwise direction.