write the thumb hand rule
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In mathematics and physics, the right-hand rule is a common mnemonic for understanding orientation of axes in 3-dimensional space.
Most of the various left- and right-hand rules arise from the fact that the three axes of three-dimensional space have two possible orientations. This can be seen by holding your hands outward and together, palms up, with the fingers curled, and the thumb out-stretched. If the curl of your fingers represents a movement from the first or x-axis to the second or y-axis, then the third or z-axis can point along either thumb. Left- and right-hand rules arise when dealing with coordinate axes, rotation, spirals, electromagnetic fields, mirror images, and enantiomers in mathematics and chemistry.
Most of the various left- and right-hand rules arise from the fact that the three axes of three-dimensional space have two possible orientations. This can be seen by holding your hands outward and together, palms up, with the fingers curled, and the thumb out-stretched. If the curl of your fingers represents a movement from the first or x-axis to the second or y-axis, then the third or z-axis can point along either thumb. Left- and right-hand rules arise when dealing with coordinate axes, rotation, spirals, electromagnetic fields, mirror images, and enantiomers in mathematics and chemistry.
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The direction of the cross product may be found by application of the right hand rule as follows:
1. The index finger points in the direction of the velocity vector v.
2. The middle finger points in the direction of the magnetic field vector B.
3.The thumb points in the direction of the cross product F.
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