DID YOU KNOW.....???????

Tuesday 26 August 2014

DID YOU KNOW.....???????

DO YOU KNOW...?

International Date Line:

If we travelled westward to a place X on longitude
180o W, the time there would be 12 hours behind
Greenwich time (180 x 4 minutes = 720 minutes = 12 hours).

If we journeyed eastward to a place Y on longitude 180o
E, the time there would be 12 hours ahead of Greenwich
time.

Thus X and Y both on 180o have the same time but differ in date by a day (12 hours + 12 hours = 24 hours).

To overcome the confusion that would otherwise arise,
the International Date Line has been established.

It runs along 180o E or W. Westward-bound vessels crossing
the Date Line drop a day from the calendar, while those
going eastward add a day by giving the same date to two
consecutive days.

Instead of changing the time exactly according to change in degrees at the rate of 4 minutes per degree, certain time zones have been established.

All places in the same area or time zone or time belt, use
what is called Standard Time.

Thus we have the Greenwich Mean Time (G.M.T) and the Indian Standard
Time (I.S.T).

There are five time-belts in Canada and four
in United States.

परोपकाराय फलन्ति वृक्षा: परोपकाराय वहन्ति नद्यः।
परोपकाराय दुहन्ति गावः परोपकाराय इदं शरीरम्।।