Time Turn
At this moment the time is 9:00 PM. Can you tell me what time it will turn, 23999 999 992 hours later ?
Labels: mathemagic, trickofmind
posted by Rajesh Lal at
9:00 PM
Sunday, August 2, 2009
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5 Comments:
Depends which country you're in and whether that country is into daylight saving.
If no daylight saving adjustment then 8 hours less than a billion days, i.e. 1.00 pm.
I get 1 pm, subtract 8 hrs...
This post has been removed by the author.
That would be 8 hours short of 1000000000 days. So it would 1 pm.
But that doesn't take into account that we make fractions of sec adjustment to time. I think they make adjustments about every decade or so.
I also got 1pm, just did it another way.
999999999 2/3 days.
2/3 day is 16 hours.
Add 16 to 9 pm = 1 pm
I think you are right Ragnot. "They make some kind of adjustment but I cannot remember what. The only thing which may cause it would be "the equation of time" I'm sure there are many people out there who could help explain this better than me but here goes.
The apparent motion of the Sun along the plane of the ecliptic is not regular. This non-uniform motion is caused by two things: 1)The Earth's orbit is not circular but elliptical and 2) the Earth's axis is tilted about 23 degrees from the ecliptic. Mean Solar time assumes that the orbit is circular that there is no tilt and everything is like "clockwork". However this is not the case, so a Sundial (which shows Real Solar time) differs from the Mean time by the Equation of Time. Since clocks and watches use Mean Solar Time there will be an apparent error between the time your watch reads and the time your dial reads.
as far as I know, it all turns out fine in the end.
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