Pengguna:Dede2008/Kaidah tangan kanan
- The x, y and z unit vectors in a Cartesian coordinate system can be chosen to follow the right-hand rule. Right-handed coordinate systems are often used in rigid body physics and kinematics.
Fleming's left-hand rule is a rule for finding the direction of the thrust on a conductor carrying a current in a magnetic field.
Left-hand rule
In certain situations, it may be useful to use the opposite convention, where one of the vectors is reversed and so creates a left-handed triad instead of a right-handed triad.
An example of this situation is for left-handed materials. Normally, for an electromagnetic wave, the electric and magnetic fields, and the direction of propagation of the wave obey the right-hand rule. However, left-handed materials have special properties, notably the negative refractive index. It makes the direction of propagation point in the opposite direction.
De Graaf's translation of Fleming's left-hand rule - which uses thrust, field and current - and the right-hand rule, is the FBI rule. The FBI rule changes thrust into F (Lorentz force), B (direction of the magnetic field) and I (current). The FBI rule is easily remembered by US citizens because of the commonly known abbreviation for the Federal Bureau of Investigation.
Symmetry
| Vector | Right-hand | Right-hand | Right-hand | Left-hand | Left-hand | Left-Hand |
|---|---|---|---|---|---|---|
| a, x or I | Thumb | Fingers or palm | First or Index | Thumb | Fingers or palm | First or index |
| b, y or B | First or index | Thumb | Fingers or palm | Fingers or palm | First or index | Thumb |
| c, z or F | Fingers or palm | First or index | Thumb | First or index | Thumb | Fingers or palm |
See also
- Chirality (mathematics)
- Curl (mathematics)
- Pseudovector
- Improper rotation
- Reflection (mathematics)
- Fleming's left-hand rule for motors
- Vorticity
- ISO 2
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