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प्रश्न
How is the longitude of a place determined?
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उत्तर
The Longitude of a place can be determined by comparing its Local Time with Greenwich Time. Greenwich Time can be known either by radio or by means of a watch which keeps Greenwich Time. Captains of ships generally use a Chronometer for this purpose. A Chronometer is a timepiece which keeps accurate time and is not affected by a change in temperature. Now suppose that when it is 2 p.m. at Greenwich, another place shows 5 p.m. The difference between the times of the two places is 3 hours, which is 180 minutes. Thus the place is =180 / 4 = 45° away from the Prime Meridian and since its time is ahead of Greenwich. Its longitude will be 45° East.
संबंधित प्रश्न
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?
What is the “Prime Meridian”?
Explain how the longitude of a place affects the time.
Give a reason for the following :
The distance between two consecutive meridians is equal to about 111 kilometers only at the equator.
Explain why the lines of longitude are called meridians of longitude?
Fill in the blanks.
The distance between the longitudes decreases towards___________.
The area found between 0° and 180° E lines of longitude is called.
India is located in this hemisphere based on lines of longitude.
The lines of longitude converge at the ______.
