Test: Longitudes & Time zones - Delhi Police Constable MCQ

The Prime Meridian is the line of 0 degrees longitude and serves as the reference for measuring all other longitudes.

The Prime Meridian is at 0 degrees longitude, and the line of longitude directly opposite to it is at 180 degrees. Therefore, the correct answer is option C) 180 degrees.

The International Date Line is located at approximately 180 degrees longitude and serves as the line where the date changes when crossing from one side to the other.

When crossing the International Date Line from east to west, you move ahead by one day because you are traveling from a time zone ahead of the line to a time zone behind it.

There are 24 time zones, each spanning 15 degrees of longitude. This allows for a variation of one hour between each adjacent time zone.

Russia has the most time zones, with a total of 11, due to its vast longitudinal extent.

Each time zone covers approximately 15 degrees of longitude, which corresponds to one hour of time difference from the neighboring time zones.

Time zone boundaries are mainly determined by natural geographic features, political decisions, and population density, not the language spoken in the region.

The Prime Meridian passes through Greenwich, London, and is associated with Greenwich Mean Time (GMT).

Daylight Saving Time is used to make better use of natural daylight and save energy by adjusting clocks forward during certain periods.

Japan does not observe Daylight Saving Time and keeps its clocks consistent throughout the year.

Sir Sandford Fleming, a Canadian engineer, proposed the idea of time zones in the 1870s to standardize timekeeping for railways.

China spans five primary time zones, making it the country with the most time zones.

As the Earth rotates once every 24 hours, the Prime Meridian passes through the same location on Earth once every 24 hours.

Kolkata (formerly Calcutta) is the central reference point for Indian Standard Time (IST), which is UTC+5:30.

Adjacent time zones generally differ by 1 hour, although some regions may have fractional hour differences.

Time zones to the east of the Prime Meridian have positive UTC offsets, such as UTC+1 or UTC+2.

The International Date Line generally follows the 180-degree longitude line.

Near the North and South Poles, time zones converge, and the time followed is usually UTC (Coordinated Universal Time).

When crossing the International Date Line from west to east, you move back by one day because you are traveling from a time zone behind the line to a time zone ahead of it.