The standard time of a place is determined by its longitude. Longitude is the measure of how far east or west a place is from the Prime Meridian, which is an imaginary line that runs through Greenwich, England.
The Earth is divided into 24 time zones, each of which is 15 degrees of longitude wide. The time in each time zone is one hour ahead of the time in the time zone immediately west of it, and one hour behind the time in the time zone immediately east of it.
For example, the standard time in New York City is Eastern Standard Time (EST), which is 5 hours behind Coordinated Universal Time (UTC). This is because New York City is located at 74 degrees west of the Prime Meridian.
There are some exceptions to this rule. For example, some countries, such as India, China, and Russia, have multiple time zones within their borders. This is because these countries are so large that they span multiple longitudes.
Another exception is Daylight Saving Time (DST). DST is a practice of setting clocks forward one hour during the summer months and back one hour during the winter months. The purpose of DST is to make better use of daylight hours and save energy.
In the United States, DST begins on the second Sunday of March and ends on the first Sunday of November. So, for example, if the standard time in New York City is EST, then the time during DST is Eastern Daylight Time (EDT), which is 4 hours behind UTC.
The standard time of a place is determined based on its longitudinal position relative to the Prime Meridian, which is the starting point of the longitudinal coordinate system (longitude) on the Earth. The Prime Meridian passes through Greenwich, London, and is designated as 0 degrees longitude.
The Earth is divided into 24 time zones, each representing 15 degrees of longitude. Since the Earth rotates 360 degrees in approximately 24 hours, each time zone covers a longitudinal span of 15 degrees (360° ÷ 24 = 15°). As a result, the time in each time zone differs by one hour from its neighboring time zones.
The time in the time zone along the Prime Meridian (0 degrees longitude) is known as Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC). This serves as the reference time, and all other time zones are expressed relative to GMT.
As we move eastward from the Prime Meridian, each time zone ahead of GMT is one hour ahead, and as we move westward, each time zone behind GMT is one hour behind. For example, if a place is located 30 degrees east of the Prime Meridian (longitude 30°E), it would be in a time zone that is two hours ahead of GMT.
Countries and regions may choose to use their standard time zones based on their geographical location or political decisions. In some cases, a country may adopt a single standard time for the entire country, while in larger countries, multiple time zones may be used to accommodate the vast territorial spread.
It is essential to establish standard time to have uniformity in timekeeping and to ensure that people in different regions synchronize their daily activities, communication, transportation, and other time-sensitive operations effectively. Standard time is crucial for maintaining global coordination and avoiding confusion in international interactions.
Answers & Comments
Answer:
The standard time of a place is determined by its longitude. Longitude is the measure of how far east or west a place is from the Prime Meridian, which is an imaginary line that runs through Greenwich, England.
The Earth is divided into 24 time zones, each of which is 15 degrees of longitude wide. The time in each time zone is one hour ahead of the time in the time zone immediately west of it, and one hour behind the time in the time zone immediately east of it.
For example, the standard time in New York City is Eastern Standard Time (EST), which is 5 hours behind Coordinated Universal Time (UTC). This is because New York City is located at 74 degrees west of the Prime Meridian.
There are some exceptions to this rule. For example, some countries, such as India, China, and Russia, have multiple time zones within their borders. This is because these countries are so large that they span multiple longitudes.
Another exception is Daylight Saving Time (DST). DST is a practice of setting clocks forward one hour during the summer months and back one hour during the winter months. The purpose of DST is to make better use of daylight hours and save energy.
In the United States, DST begins on the second Sunday of March and ends on the first Sunday of November. So, for example, if the standard time in New York City is EST, then the time during DST is Eastern Daylight Time (EDT), which is 4 hours behind UTC.
Explanation:
Answer:
The standard time of a place is determined based on its longitudinal position relative to the Prime Meridian, which is the starting point of the longitudinal coordinate system (longitude) on the Earth. The Prime Meridian passes through Greenwich, London, and is designated as 0 degrees longitude.
The Earth is divided into 24 time zones, each representing 15 degrees of longitude. Since the Earth rotates 360 degrees in approximately 24 hours, each time zone covers a longitudinal span of 15 degrees (360° ÷ 24 = 15°). As a result, the time in each time zone differs by one hour from its neighboring time zones.
The time in the time zone along the Prime Meridian (0 degrees longitude) is known as Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC). This serves as the reference time, and all other time zones are expressed relative to GMT.
As we move eastward from the Prime Meridian, each time zone ahead of GMT is one hour ahead, and as we move westward, each time zone behind GMT is one hour behind. For example, if a place is located 30 degrees east of the Prime Meridian (longitude 30°E), it would be in a time zone that is two hours ahead of GMT.
Countries and regions may choose to use their standard time zones based on their geographical location or political decisions. In some cases, a country may adopt a single standard time for the entire country, while in larger countries, multiple time zones may be used to accommodate the vast territorial spread.
It is essential to establish standard time to have uniformity in timekeeping and to ensure that people in different regions synchronize their daily activities, communication, transportation, and other time-sensitive operations effectively. Standard time is crucial for maintaining global coordination and avoiding confusion in international interactions.
Explanation: