గడియారం యొక్క ఆవిష్కరణ చరిత్ర | clock documentary in Telugu . скачать в хорошем качестве

గడియారం యొక్క ఆవిష్కరణ చరిత్ర | clock documentary in Telugu .

గడియారం యొక్క ఆవిష్కరణ చరిత్ర | clock documentary in Telugu . Today we take knowing the time and the day of the year for granted but for our ancestors, it was far more difficult. Until mechanical clocks were invented in the 13th century there were various ways of telling the time. The earliest method of telling the time of day was the sundial. It is not known when the sundial was invented but it was certainly used in Ancient Egypt and Ancient Iraq. They are also mentioned in the Old Testament. Other ancient civilizations such as the Greeks and the Romans also used sundials. Over time sundials gradually became more accurate and they remained a common way of telling the time until the early 19th century. About 1400 BCE the Egyptians invented the water clock. It consisted of two containers of water, one of which was higher than the other. Water flowed along a tube from the higher container to the lower at a steady rate. Rings were marked on the inside of the lower container and when the water level reached one it meant another hour had passed. The Saxons used a candle clock. A candle was divided into segments and it took an hour for each segment to burn. Mechanical Clocks The mechanical clock was invented in the Middle Ages. Who made the first one and when is not known but it was around the end of the 13th century. In 1309 a clock is recorded in a church in Italy. The oldest working clock in the world is in Salisbury Cathedral. It dates from 1386 and it has no dial. Instead, it chimes the hours. (Our word clock comes from the Latin word for bell ‘clocca’). Early clocks were normally in churches and they were very heavy because they were worked by weights. However, in about 1450 the coiled spring was invented and it made possible portable clocks. The first watches were made in 1510. In the 16th century, some rich people had clocks in their homes but they were very expensive. Early clocks were not very accurate but in 1657 Christiaan Huygens introduced the pendulum. Clocks became far more accurate though they were still set using sundials. In the late 17th clocks with long cases were made. In the early 20th century they became known as Grandfather clocks. Meanwhile, the cuckoo clock was invented c. 1775. The stopwatch was invented in 1776 and the electric clock was invented in 1840. The quartz crystal clock was invented in 1929 and the atomic clock was invented in 1955. most interesting and unknown facts in telugu, unknown facts in telugu, facts in telugu, amazing facts in telugu, interesting facts in telugu, unknown facts, interesting and amazing facts, most interesting facts, telugu unknown facts, facts, interesting facts, interesting facts you never know, most amazing top 10, interesting facts, telugu facts, telugu interesting facts, telugu real facts, amazing, arun surya teja, t talks,think deep,think deep videos,think deep riddles,think deep riddles in telugu,think deep new video #interestingfacts#history of clock# history of watches# clock invention story# story of clock# story of ancient clock# clock documentary# who invented clock# evolution of clock# ancient clock# ancient clock history# #telugu wonders #think_deep_latest_videos​​​​​​​​​​ ​ concept and Editing :- V . jagannadham scropting &Voice Over :- *J.S.ARVIND, Disclaimer- Some contents are used for educational purpose under fair use. Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use. The Content used In this Video is only For educational purpose For Any Copyright Issues or for branding promotions Contact Me on riddlestelugu1@gmail.com