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What is the oldest instrument used to measure time?
The sundial
How were clocks invented?
Clocks have been around since ancient times. The origins are not exact but it is widely known that the sundial was the first instrument used to measure time. Using the exact point of midday the sundial morphed into the obelisk that the Egyptians used to pinpoint midday.
When Was The Sundial First Used to Tell Time?
Scientists believe it was in about 3500 BC (about 5500 years ago).
What is the sundial used for?
To tell time they were used thousands of years ago. It was used to see the time by the sun's ray's shadow. The Romans were the first to create the very first sundial called the gnomon. It was basically a stick in the ground with markings around it so as the shadows hit the markings whatever number that marking was is what time it is.
How did the Aztecs measure time?
using a sundial
What did George Washington use to tell the time?
He used a portable sundial.
What is a sundial and who was the first person to make it?
a sundial is a device that was used to tell time a long time ago. here is a vid that will tell you all about them: http://www.youtube.com/watch?v=tI0GqYJha1Q
Why did Brady Alan Easterday invented the sundial?
He didn't. The sundial, or gnomon has been used since antiquity.
Why portable sundial need a compass?
A portable sundial needs a compass to ensure it is correctly aligned with true north. This alignment allows the sundial to accurately cast a shadow based on the position of the sun, which changes throughout the day and across seasons. Without a compass, the sundial could provide incorrect time readings, as the shadow would not correspond accurately to the sun's position in the sky. Thus, the compass is essential for precise timekeeping with a sundial.
When was the sundial widely used?
In Ancient Times
Why can't you tell the time on a sundial all year long?
You need direct sunlight to use a sundial, so it cannot be used at night or when clouds or pollution are diffusing the sunlight too much to create shadows.
What is the oldest instrument used to measure time?
The sundial
The apparatus used in the past to measure time?
A sundial
How were shadows used in the past to tell the time?
A sundial
How do you use sundial in a sentence?
Well, for starters you just used sundial in a sentence. But another sentence could be... Sundials help you tell time.
What is the pin of a sundial whose shadow points to the hour called?
The pin of a sundial where the shadow falls is called the gnomon. It is typically a thin, straight rod that extends vertically from the sundial's base. The shadow cast by the gnomon is used to indicate the time of day on the sundial's face.
What was used to measure angles?
* theodolite * protractor * sundial * the hand
