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प्रश्न
Why do some countries have many time zones?
OR
What are ‘Time Zones’?
उत्तर
Large countries like Russia, Canada, and the United States have vast longitudinal extent. They do not have a single Standard Time for the whole Country. They have many time zones, with each time zone covering about 15° of longitude. The erstwhile Soviet Union had 11 times zones to cover 165° of longitudinal extent. Canada and the United States have five time zones extending from the Atlantic coast of the Pacific coast. There is a time difference of five hours between the two coasts.
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संबंधित प्रश्न
Which line of longitude is used to fix the World Standard Time? State its value in degrees.
Give a reason for the following:
Diametrically opposite lines of longitude and the Equator are called Great Circles.
Calculate the local time in Singapore (104°E) when it is 6.00 p.m. at Greenwich.
How far is it correct to say that local time is the Sun time?
Give a reason for the following :
Local time is a theoretical reality, while Standard Time is a practical necessity.
Which place is used as a standard for time all over the world?
A cricket match begins at 10.30 am on January 10 in New Zealand (time zone of +12). Tell the time in Greenwich when it is shown live on TV there.
Two opposite meridians form a ______.
What are called meridians of longitude?
Write a note on Longitudes.
