Why 24 Hours in a Day
Each country has its own measurements, but measuring Time is same in all over the world A Day contains 24 hours, Each Hour contains 60 Minutes and Each minute has 60 seconds.
Who introduced this system? The Ancient Egyptians divided A day into 10 hours using sundial and they added Twilight hours at the beginning and end of the day they called as lomb
Ancient Egyptians divided Night-time into 12 hours based on observing Stars in the sky
They had a system of 36 star groups called ‘decans’ — chosen so that on any night one decan rose 40 minutes after the previous one.
In their system the day and night times are unequal due to summer and winter season the inequal hours they called Lomb.
What about hours and sesonds?
Ancient Babylonians divided Hours into Minutes and seconds, They used a system called sexagesimal means counting in 60s for their Mathematics and Astronomy calculations in 3500BC.
The use of 12 subdivisions for day and night, with 60 for hours and minutes, turns out to be much more useful than (say) 10 and 100 if you want to avoid having to use complicated notations for parts of a day. Twelve is divisible by two, three, four, six and 12 itself – whereas 10 has only three divisers – whole numbers that divide it a whole number of times. Sixty has 12 divisers and because 60 = 5 x 12 it combines the advantages of both 10 and 12. In fact both 12 and 60 share the property that they have more divisers than any number smaller than themselves. This doesn’t, of course, explain how this system spread throughout the world.
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