Question

International Date Line passes through
A) $0^o$ Greenwich
B) $90^o$ Greenwich
C) $180^o$ Greenwich
D) $270^o$ Greenwich

Answer 1

Hint:
i) Established in 1884, the International Date Line passes through the mid-Pacific Ocean and England in one line.
ii) It is an imaginary line of demarcation that extends from the North Pole to the South Pole on the Earth's surface and demarcates the transition from one calendar day to the next.
iii) For global interconnectivity, instantaneous contact, time measurement and consistent international databases, the International Date Line is essential.

Complete answer:
An imaginary line on the Earth's surface, going from north to south in the Pacific Ocean, is the International Date Line (IDL), also known as the Date Line. From the prime meridian, the zero degree longitude formed in Greenwich, England in 1852, it is located halfway around the world. As a "line of demarcation" dividing 2 consecutive calendar dates, the International Date Line works. The date becomes one day later when one travels westward through it and one day earlier when one travels eastward across it.

The explanation for this impact is that the time zone is 10-12 hours longer than Greenwich for the countries on the western side of the International Date Line (in or outside East Asia). And the countries on its eastern side (Alaska/Hawaii and other regions) have 9-12 hours less time than Greenwich in the time zone.

So one's watch has to be set for 20-24 hours while travelling across the line, depending on the time zones. New Zealand, for example, is 12 hours ahead of Greenwich Mean Time, while Hawaii is 10 hours ahead of Greenwich Mean Time. The clocks must be turned backwards for 22 hours, around one day while travelling from New Zealand to Hawaii.

Greenwich meridian, an imaginary line used to denote the longitude of 0 ° that passes through Greenwich, a London borough, and ends at the poles of the North and South. Option A is therefore incorrect.

The 90° meridian east of Greenwich is a longitudinal line stretching to the South Pole from the North Pole across the Arctic Ocean, Asia, the Indian Ocean, the Southern Ocean, and Antarctica. Thus, Option B is incorrect as well.

The International Date Line parallels the meridian down the middle of the Pacific Ocean at 180 ° longitude. Option C is therefore the right answer.

It does not pass through 270 ° Greenwich on the International Date line. Option D is therefore an incorrect option.

Hence the correct answer is option ‘C’.

Note: Despite its name, there is no legal international status for the International Date Line and countries are free to select the dates they observe. On the other side of the planet to the Prime Meridian lies the International Date Line. The island of Kiribati used to be on the International Date Line's eastern side, but it is now on the line's western side. In order to be the first nation to be seen in the year 2000, it changed sides.