Question

Among the following , the early instrument that was used to estimate time is

Answer 1

The sun clock who was the earliest instrument to estimate the time.

Explanation:

• due to the rotation of the earth from west to east there is movement of all the celestial bodies which is present from the east direction to the west. Due to the constant speed of the earth we can estimate the time by the position of the sun.
• Actually by convention it is taken that 12 o'clock in mid day is the time when the sun is directly overhead. Sunclock was the earliest form of clock.

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