Introduction:
The prime meridian is an imaginary line that divides the Earth into the Eastern Hemisphere and the Western Hemisphere. It is often used as a reference point for measuring longitudes.

Definition of Prime Meridian:
The prime meridian is the line of longitude that passes through the Royal Observatory in Greenwich, London. It is designated as 0 degrees longitude and serves as the baseline for measuring both eastward and westward longitudes.

Correcting the Statement:
The statement "Prime meridian is the 180⁰E or w longitude" is incorrect. The prime meridian is not located at 180 degrees east or west longitude.

Explanation:
The prime meridian is fixed at 0 degrees longitude, which means it is neither east nor west of any other meridian. It is an arbitrary line chosen as a reference point for measuring longitudes. The 180 degrees longitude is called the International Date Line, which is located opposite the prime meridian and serves as the transition line where each new day begins.

Key Points:
- The prime meridian is the line of longitude designated as 0 degrees.
- It passes through the Royal Observatory in Greenwich, London.
- It serves as the reference point for measuring eastward and westward longitudes.
- The 180 degrees longitude is known as the International Date Line.

Conclusion:
In conclusion, the prime meridian is not located at 180 degrees east or west longitude. It is fixed at 0 degrees longitude and serves as the reference point for measuring longitudes. The 180 degrees longitude is the International Date Line, which is located opposite the prime meridian.