Question

What is the Prime Meridian? What is the other name for it and why?

Answer 1

Hint: The lines of reference running from the North Pole toward the South Pole are known as meridians of longitude. The Prime Meridian and $180^\circ $ meridian partition the earth into equivalent parts which are known as the Eastern Hemisphere and the Western Hemisphere.

Complete Answer:
The meridian goes through Greenwich, where the British Royal Observatory is found. This meridian is viewed as the Prime Meridian. The estimation of these meridians is $0^\circ $ longitudes and from it, we consider $180^\circ $ toward the east as well as $180^\circ $ toward the west. Hence, the Prime Meridian is also known as the Greenwich Meridian.
At the point when the Prime Meridian of Greenwich has the sun at the highest point in the sky, all the spots along this meridian will have late morning or early afternoon. As the earth turns from west to east, those spots east of Greenwich will be in front of Greenwich time and those toward the west will be behind it. It may very well be determined this way-The earth pivots $360^\circ $ in around 24 hours, which implies $15^\circ $ an hour or $1^\circ $ quickly. Hence, when it is early afternoon at Greenwich, the time at $15^\circ $ east of Greenwich will be $15 \times 4 = {\text{an hour}}$, i.e., 1 hour in front of Greenwich time, but at $15^\circ $ west of Greenwich, the time will be behind Greenwich time by 60 minutes.

Note: The Equator is an imaginary line running on the globe that separates it into halves. The equator is the zero-degree parallel. Its separation from the equator to both of the shafts is one-fourth of a hover around the earth, it will quantify one-fourth of 360 degrees.