You'll probably say this after reading the title: “Time is
measured in seconds you dumbass”. Just to clear your doubts about the dumbass
thing, I know that time is measured in seconds, minutes, hours and on and on.
But I'm not talking about the SI unit of measuring time here. Look at your
watch. Check the time right now. How is it determined what the is time as shown
by your watch. Let’s say the time is 9:00PM, but why is it 9PM right now? Well,
because our watches say so. But why does our watch say that its 9PM? How does
it know that right at this moment its 9PM?
Well actually, Time is measured or determined by observing
the Earth’s movements relative to the sun. One complete spin of the Earth on
its axis takes a day. And approximately 365.26 spins (days) make one complete
revolution around the sun. This one revolution makes up one solar year. Units
of time smaller than a day such as hours, minutes and seconds are then measured
using clocks. Weeks, months and years are accordingly measured with the help of
calendars.
Daily Fact: The
AM and PM used to divide 24 hours of the day into two parts actually mean
something. AM is short for the Latin
phrase ante meridiem meaning ‘before
midday’. And PM is short for the
Latin phrase post meridiem meaning
‘after midday’.
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