Helicity may refer to: *

Helicity (fluid mechanics) Helicity may refer to: * Helicity (fluid mechanics), the extent to which corkscrew-like motion occurs * Helicity (particle physics), the projection of the spin onto the direction of momentum * Magnetic helicity, the extent to which a magnetic fiel ...

, the extent to which corkscrew-like motion occurs *

Helicity (particle physics) In physics, helicity is the projection of the spin onto the direction of momentum. Mathematically, ''helicity'' is the sign of the projection of the spin vector onto the momentum vector: "left" is negative, "right" is positive. Overview T ...

, the projection of the spin onto the direction of momentum *

Magnetic helicity In plasma physics, magnetic helicity is a measure of the linkage, twist, and writhe of a magnetic field. Magnetic helicity is a useful concept in the analysis of systems with extremely low resistivity, such as astrophysical systems. When resistiv ...

, the extent to which a magnetic field "wraps around itself" *

Circular dichroism Circular dichroism (CD) is dichroism involving circular polarization, circularly polarized light, i.e., the differential Absorption (electromagnetic radiation), absorption of left- and right-handed light. Left-hand circular (LHC) and right-hand ci ...

, the differential absorption of left and right circularly polarized light * A form of

axial chirality In chemistry, axial chirality is a special case of chirality (chemistry), chirality in which a molecule contains two pairs of chemical groups in a non-planar arrangement about an axis of chirality so that the molecule is not superposable on its mi ...

* A former name for

inherent chirality In chemistry, inherent chirality is a property of asymmetry in molecules arising, not from a stereogenic or chiral center, but from a twisting of the molecule in 3-D space. The term was first coined by Volker Boehmer in a 1994 review, to describ ...

See also