The First Seismoscope (3D Animation)

Описание: The First Seismoscope
𝗜𝗻𝗱𝗲𝘅:
⏲ 0:00 Intro
⏲ 0:27 The First Seismoscope
⏲ 2:14 Working mechanism of the seismoscope
⏲ 3:16 Outro

📫𝐎𝐮𝐫 𝐅𝐁 𝐏𝐚𝐠𝐞:
  / scienceworld-106933907791981  

🎧𝗠𝘂𝘀𝗶𝗰:
Awake by Sappheiros |   / sappheirosmusic  
Music promoted on https://www.chosic.com/free-music/all/
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
https://creativecommons.org/licenses/...

📚𝐃𝐚𝐯𝐢𝐝'𝐬 𝐁𝐨𝐨𝐤𝐬
📕 𝗪𝗲𝗶𝗿𝗱 𝗠𝗮𝘁𝗵𝘀: 𝗔𝘁 𝘁𝗵𝗲 𝗘𝗱𝗴𝗲 𝗼𝗳 𝗜𝗻𝗳𝗶𝗻𝗶𝘁𝘆 𝗮𝗻𝗱 𝗕𝗲𝘆𝗼𝗻𝗱
(https://www.amazon.com/Weird-Maths-Ag...)
📙 𝗪𝗲𝗶𝗿𝗱𝗲𝗿 𝗠𝗮𝘁𝗵𝘀: 𝗔𝘁 𝘁𝗵𝗲 𝗘𝗱𝗴𝗲 𝗼𝗳 𝘁𝗵𝗲 𝗣𝗼𝘀𝘀𝗶𝗯𝗹𝗲
(https://www.amazon.com/Weirder-Maths-...)
📗 𝗪𝗲𝗶𝗿𝗱𝗲𝘀𝘁 𝗠𝗮𝘁𝗵𝘀: 𝗔𝘁 𝘁𝗵𝗲 𝗙𝗿𝗼𝗻𝘁𝗶𝗲𝗿𝘀 𝗼𝗳 𝗥𝗲𝗮𝘀𝗼𝗻
(https://www.amazon.com/Weirdest-Maths...)
** The kindle versions are available
*** For more details : http://weirdmaths.com/

📄𝗧𝗿𝗮𝗻𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻:
In ancient times, many people believed that earthquakes were punishments sent by the gods. In the Zhou Dynasty of China, they were taken to be disturbances of cosmic yin and yang aimed at either the dynasty’s rulers or the common folk. An earthquake, for instance, might be a sign that the gods were angry with the rulers for ignoring the grievances of their subjects.

The first seismoscope was made in China in AD 132 by Zhang Heng, hundreds of years ago before the invention of the seismograph. Zhang Heng was an astronomer, mathematician, seismologist, hydraulic engineer, inventor, geographer, cartographer, ethnographer, artist, poet, philosopher, and politician.

His seismoscope was called Houfeng didong yi, which means “instrument for measuring seasonal winds and movements of the Earth”, and was able to determine roughly the direction in which an earthquake occurred.

Houfeng didong yi was 2.8 meters in diameter and 1.8 meters high. On the outside were eight dragon heads facing the eight principal directions of the compass. Below each dragon head was a toad with its mouth open toward the dragon. When an earthquake occurred, one of the dragon-mouths would release a ball into the open mouth of the toad below. The direction of the earthquake determined which of the dragons released its ball.

The instrument is said to have detected an earthquake 650 km (or 400 miles) away that wasn’t felt at the location of the seismoscope. What was inside the seismoscope we don’t know because the instrument was lost after the Mongols overran China. However, there are some theories about how it worked. The most likely mechanism was tested between 2002 and 2007 by Chinese scientists and passed all the tests.

Researchers believe that inside the seismoscope were a pendulum, a bronze ball under the pendulum, 8 channels, and 8 levers that activated the dragon’s mouths. When a shockwave struck the location of the seismoscope, the instrument moved in the same direction as the shockwave but the pendulum didn’t respond instantly. Because the bottom of the pendulum and the bronze ball were in contact with each other, the bronze ball moved in the opposite direction to the shockwave and fell into a channel. The ball moved through the channel and hit the lever. The lever moved the dragon’s jaw and the ball fell into a toad’s mouth, which indicated the direction of the earthquake.

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