A null vector, also known as a zero vector, is a vector that has a magnitude of zero and no specific direction. In mathematical terms, it is represented as 0 in a coordinate system, meaning all its components are zero. For example, in a two-dimensional space, the null vector can be expressed as (0, 0). It serves as the identity element in vector addition, meaning that adding a null vector to any other vector does not change the value of that vector. In physics and engineering, the null vector plays a crucial role in various calculations and theories. It is essential in defining vector spaces, where it acts as a reference point. The concept of the null vector is also important in fields like computer graphics and robotics, where it helps in determining positions and movements in a coordinate system.