A surface parallel to mean spherical surface of earth is called.

A surface parallel to mean spherical surface of earth is called.

زمین کی کروی سطح کے متوازی سطح کو کہتے ہیں؟
Explanation

 It is a surface where the gravitational potential is constant.

Always perpendicular to the direction of gravity.

The geoid is the most well-known level surface, representing mean sea level.