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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
Which meridian is called Prime meridian?
What do you mean by meridians?
Name the two hemispheres of the Earth made by the equator?
Why do some countries have many time zones?
OR
What are ‘Time Zones’?
Give a reason for the following :
The opposite meridians of longitude form a Great Circle.
What will be local time at Delhi 77° E longitude when it is 3 p.m. at Tokyo 139°E longitude?
“The degree of longitude decreases in length poleward”. Why?
Which place is used as a standard for time all over the world?
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:
What is known as Eastern Hemisphere?
