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प्रश्न
(a) What is the rule of changing the date while crossing the international date line?
(b) What is meant by ‘six-day week’ and ‘eight-day week’?
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उत्तर
Rule: On crossing the date line, the ships adjust the dates according to the following rules :
(a) When crossing westward, towards Asia (from U.S.A. to Japan), a day must be added.
When crossing the date line, ship misses a day from the calendar and have ‘six day week’. If a ship crosses the date line on Monday, the next day will be Wednesday and not Tuesday.
(b) When crossing eastward towards America (from Japan to the U.S.A.) a day must be subtracted. When crossing the date line ships gain a day from the calendar and have an ‘eight-day week’. It repeats a day. If a ship crosses the date line on Monday, the next day will be again Monday and not Tuesday.
संबंधित प्रश्न
Give a reason for the diametrically opposite lines of longitude and the Equator are called Great Circles.
Give a reason the international date line deviates and goes zig-zag near some Islands in the Pacific ocean.
Calculate the longitude of a place where the local time is 6.00 a.m. when the time is 9.00 p.m. at New Delhi on longitude 77° E.
Name the two hemispheres of the Earth made by the equator?
Why are letters E or W added to longitude values?
Explain how the longitude of a place affects the time.
Clearly distinguish Longitude from Lines of Longitude.
What adjustment has to be made when ships cross the International Date Line?
OR
Explain why a day appears to be lost in sailing round the world from east to west and gained when travelling from west to east.
A ship crossing international dateline at mid-night on Wednesday Eastwards, find that it is mid-night Tuesday on the American side. Why?
Statement I: The lines of latitude on Earth are used to find the location of a place and define the heat zones on Earth.
Statement II: The lines of longitudes on Earth are used to find the location of a place and to calculate time.
Choose the correct option:
