Q4 of 14 Page 62

Write in brief.

Why is the IDL considered with respect to 180 ̊ meridians only?

The International Date Line was constructed in 1884 to change the date and time according to the global travelling. The crossing of the 180 ̊ prime meridians can result in the change of time zone. Thus some precautions have to be taken to avoid the confusions in the time zones. Thus the date and time may have to be changed to incorporate this. This has to be made by considering the Greenwich 180 ̊ prime meridian.


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4

Write in brief.

While crossing the IDL, what changes will you make?

 4

Write in brief.

Why is the IDL not a straight line like the 180 ̊ meridians?

 4

Write in brief.

Why doesn't the IDL pass through the land?

 5

Using Atlas, tell which of the following routes the IDL will be crossed and show them.

a. Mumbai-London-New York-Los Angeles-Tokyo


b. Delhi-Kolkata-Singapore-Melbourne


c. Kolkata-Hong Kong-Tokyo-San Francisco


d. Chennai-Singapore-Tokyo-Sydney-Santiago


e. Delhi-London-New York