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The evolution of the technology of clocks continues today. The apparent position of the Sun in the sky moves over the course of each day, reflecting the rotation of the Earth.

For convenience, distance, telephony or blindness, auditory clocks present the time as sounds.This object can be a pendulum, a tuning fork, a quartz crystal, or the vibration of electrons in atoms as they emit microwaves. Digital clocks display a numeric representation of time.Two numeric display formats are commonly used on digital clocks: 24-hour notation and 12-hour notation.During the 15th and 16th centuries, clockmaking flourished.The next development in accuracy occurred after 1656 with the invention of the pendulum clock.

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A sundial shows the time by displaying the position of a shadow on a (usually) flat surface, which has markings that correspond to the hours.

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