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प्रश्न
What is the relation between longitude and time?
Or
“There is a difference of 4 minutes of time for one degree of longitude”. Why?
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उत्तर
There is a close relation between longitude and time. The Earth makes one complete rotation of 360 degrees in 24 hours. It passes through 15 degrees is one hour or one degree in four minutes. Thus, there is a difference of 4 minutes of time for one degree of longitude. As the Earth moves from West to East, the places East of Greenwich gain time whereas the places West of Greenwich loose time.
संबंधित प्रश्न
Which line of longitude is used to fix the World Standard Time? State its value in degrees.
Give a reason for the diametrically opposite lines of longitude and the Equator are called Great Circles.
State the use of the lines of longitude in relation to distance and time.
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.
How many lines of longitude are there?
Give a reason for the following :
The opposite meridians of longitude form a Great Circle.
Give a reason for the following :
The distance between two consecutive meridians is equal to about 111 kilometers only at the equator.
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.
The time difference between Greenwich and India is ______.
How are the hemispheres divided on the basis of lines of latitude and longitude? Explain with diagrams.
