right-hand rule

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right-hand rule

n. Physics
A rule that uses the shape of the right hand to establish the standard orientation of vector quantities normal to a plane, especially when calculating a vector product or the helicity of particle spin. For example, in the case of spin, the fingers of the right hand should curl in the direction of rotation; the thumb then points in the direction of the spin vector.
References in periodicals archive ?
Using the "right hand rule," with the index finger of the right hand pointing in the direction of the electric field (down) and the middle finger pointing in the direction of the magnetic field (into the paper), your thumb will point in the direction of propagation (to the right).