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What is the significance of Greenwich Mean Time in calculating the time for a place?
In 1884 the Greenwich Meridian was recommended as the Prime Meridian of the World. As the reference for GMT, the Prime Meridian at Greenwich therefore became the centre of world time and the basis for the global system of time zones.
What is the reason for calculating international time difference from Greenwich?
Each of these longitudes is called a degree. The 0 degree longitude passing through Greenwich, near London, is considered as standard and the time of all other time zones are calculated accordingly. So the time difference between Greenwich and India is 82.5 x 4, which is 330 minutes (5 hours 30 minutes).
What is the significance of Greenwich Mean Time for Class 6?
The local time at Greenwich, is considered as the accurate time for the Prime Meridian, and is called Greenwich Mean Time or GMT. Since the earth rotates from west to east, the places east of Greenwich are ahead of Greenwich Mean Time and those to the west are behind it.
How do you use Greenwich Mean Time?
Greenwich Mean Time is calculated by using the sun. When the sun is at its highest point, exactly above the Prime Meridian, this means that it is 12:00 noon at Greenwich. The Prime Meridian is the imaginary line that splits the Earth up into two equal halves: the Western Hemisphere and the Eastern Hemisphere.
What is the use of Greenwich?
As the prime meridian, the north-south line at Greenwich is used as the reference for all other meridians of longitude, which are numbered east or west of it. The Greenwich meridian also serves as the basis for the world’s standard time zone system.
Why the time is different in different countries?
As Earth rotates, different parts of Earth receive sunlight or darkness, giving us day and night. As your location on Earth rotates into sunlight, you see the sun rise. Since different parts of Earth enter and exit daylight at different times, we need different time zones.
What is Greenwich time Class 5?
Greenwich Mean Time (GMT) is the time measured on the Earth’s zero degree line of longitude, or meridian. West of the Greenwich Meridian, local time is behind GMT (e.g. local time in New York is GMT -5 hours in winter and GMT -4 hours in summer).
Why is the world divided into time zones Class 6?
Ans: The world is divided into time zones because different part of earth gets daylight (sunlight) at different times, so to avoid confusion in keeping time over different parts of the country it is divided into time zones.
How is time calculated in different countries?
So if it is 12 noon at Greenwich (0 degree), it would be 12:04 pm at 1 degree meridian and so on. In India, the standard meridian is 82-and-half degree. So the time difference between Greenwich and India is 82.5 x 4, which is 330 minutes (5 hours 30 minutes).