Why Do We Divide the Day Into Seconds, Minutes, and Hours?

TL;DR

The video explores the reasons behind the division of the day into seconds, minutes, and hours, as well as the historical civilizations that developed different numerical systems for measuring time.

Transcript

hello I'm Simon Whistler you're watching the today I found our YouTube channel banned in the video today we're looking at why we divide the day into seconds minutes and hours today the most widely used numerical system is a base-10 system also known as the decimal system this seems appropriate given that we all have ten fingers and ten toes so grad... Read More

Key Insights

• 🥳 The division of the day into smaller parts, such as hours, minutes, and seconds, has its origins in ancient civilizations like the Egyptians.
• ⌛ Different civilizations developed various numerical systems for time measurement, with the base 60 system being widely used due to its convenience in dividing time and space.
• ⌛ The accurate measurement of time was crucial for ancient astronomers, who used astronomical techniques borrowed from the Babylonians.
• 🖐️ Mechanical clocks played a significant role in standardizing the length of an hour, further building upon the divisions established by earlier civilizations.
• 🥳 The concept of a second as a unit of time measurement is derived from the Babylonian base 60 system and the subsequent division of circles into smaller parts.
• 🫀 Leap seconds are periodically added to the atomic timescale to account for the Earth's slowing rotation and to keep it aligned with the more precise atomic clocks.
• 🧑‍🏭 The historical development of time measurement systems highlights the cultural, practical, and scientific factors that influenced their creation.

Questions & Answers

Q: Why did ancient civilizations use different numerical systems for time measurement?

Ancient civilizations used different numerical systems based on cultural and practical considerations. The base 12 and base 60 systems offered convenient ways to express fractions of time and divide circles into equal parts.

Q: How did the Egyptians measure time after dark?

The Egyptians used a set of stars, initially 36 and later reduced to 24, to mark the passage of time during the night. They observed the positions of these stars to determine the hours.

Q: What were some other methods used to measure time in ancient civilizations?

One of the most accurate known clocks in ancient times was the water clock called CLEP Sidra. It used water pressure to mark the passage of time during different months. There were also other methods, such as the use of sundials and observations of celestial bodies.

Q: When did a fixed length for an hour become widely accepted?

It wasn't until about the 14th century, with the rise of mechanical clocks, that a fixed length for an hour became widely accepted. Greek astronomer Hipparchus proposed dividing the day into 24 equinoctial hours, observed during equinoxes.

Summary & Key Takeaways

• The Egyptians were the first society to divide the day into two 12-hour sections - night and day - using sundials for measurement.

• The Egyptians also used stars to mark the passage of time during the night, eventually settling on a system of 24 stars to divide the darkness.

• Different civilizations, such as the Babylonians and Greeks, contributed to the development of the base 60 system and the division of time into minutes and seconds.