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Made by Manasvi Bhambani
The earliest timekeeping devices were reliant on the Sun. Egyptians divided the
day into fourteen parts ten daytime parts for Twilight parts two in the morning and two in the evening and with
a shadow clock they could keep trace of time quite precisely however these clocks are useless on
overcast days and at night.
The first implement did not rely on celestial clues were the water clocks the earliest description of a water clock came from an Egyptian pharaoh although it only measured hours water clocks was still the best solution yet. Plato, the famous Greek philosopher created the first alarm clock by developing a water clock as the water built up in a jar Hitler whistled that woke him up because water freezes at 0 degrees Celsius later.It has been replaced by mercury which freezing point is minus 30 degrees Celsius.
In 520 AD the Chinese poem by You Jiangu mentioned a clock which was a candle capable of measuring time at night. King Alfred the Great who lived in the ninth century used a special device with six candles each were 12 inches high and made for 72 pennyweights of Wax and was able to burn for up to four hours therefore every inch represented
twenty minutes and six candles lasted for 24 hours .
Although the origin of the hourglass is unclear it is believed that they were introduced to Europe by a monk
called Luke Pound some believed that the Egyptians were the inventors of the
hourglass but one thing is for sure it
has been used on medieval ships for
navigational purposes for example in
1522 when Magellan traveled around the globe he had 18-hour glasses on his ship.
In Europe the first clock makers were
Christian monks a man who is known as
Pope Sylvester ii built the first clock
in the 11th century these timekeeping
inventions became very popular around
the 14th century and they were mainly
used in churches and cathedrals Galileo
Galilei was the father of science and he
invented the telescope and also
discovered the moons of Jupiter and he
contributed a lot to the evolution of
the timekeeping devices with his
experiments on the pendulum he realized
the regular swing of a pendulum can be
used to regulate a clock it took fifty years before finally the first pendulum clock was built by a
Dutch mathematician this was a giant leap in the position of timekeeping devices
The first pocket watch was invented by German locksmith. It doesn't have a minute dial as the accuracy of this watch was around 30
minutes per day but it was portable. What is a pendulum for a clock is the balanced spring for a pocket watch this invention belongs to the same man who built the pendulum clock the balance spring made them accurate to within 5 minutes per day this was the dawn of the accurate timekeeping and the revolution
of the watchmaking industry
In 1904 a Brazilian aviator asked the
famous watchmaker Cartier to make him a
wristwatch a few years later the first
world war came and it changed everything
aviators and soldiers were the first men
who wore wristwatches simply because it
was more convenient to look at
wristwatch rather than take out a pocket
watch during a battle quartz crystals
and it's piezoelectric ability made possible to create the most accurate timekeeping devices in the 1930s but how does it work? when a quartz crystal is exposed to electrical charge it resonates at a certain frequency this is more than thirty thousand times per second the electrical circuit measures the quartz frequency and controls a motor which drives the gears to the hand up until this point quartz the most precise timekeeping option.
Atomic clock is so precise as it
uses the cesium atom to
measure time and in 1967 it was formally
recognized as the new international unit
of time. one second was defined as
9,192,631,770 oscillations of the cesium
atom resonant frequency.
A digital clock is a type of clock that displays the time digitally (i.e. in numerals or other symbols), as opposed to an analogue clock. Digital clocks are often associated with electronic drives, but the "digital" description refers only to the display, not to the drive mechanism.