Definition:Right-Hand Rule/Axial Vector

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Let $\mathbf V$ be an axial vector acting with respect to an axis of rotation $R$.

Consider a right hand with its fingers curled round $R$ so that the fingers are pointed in the direction of rotation of $\mathbf V$ around $R$.

The right-hand rule is the convention that the direction of $\mathbf V$ is the direction in which the thumb is pointing:


Also known as

The right-hand rule for axial vectors is also known as the right-hand screw rule.

This is because it defines the direction of motion of a conventional screw: turn it in a clockwise direction and it screws in.