What in area vector?

Explanation

### Step-by-Step Solution:

1. **Definition of Area Vector**:
The area vector is a vector that represents the area of a surface in space. It has both magnitude and direction. The magnitude of the area vector is equal to the area of the surface, and the direction is perpendicular to the surface.

2. **Direction of Area Vector**:
The direction of the area vector is determined by the orientation of the surface. For a flat surface, the area vector points outward from the surface. For example, if you have a rectangular surface, the area vector will point away from the surface in a direction that is perpendicular to it.

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