Specific rotationSpecific rotationThe CRC Handbook of Chemistry and Physics defines specific rotation as: For an optically active substance, defined by [α]θλ = α/γl, where α is the angle through which plane polarized light is rotated by a solution of mass concentration γ and path length l.
› wiki › Specific_rotationSpecific rotation - Wikipedia equation, [α], is a fundamental property of chiral substances that is expressed as the angle to which the material causes polarized light to rotate at a particular temperature, wavelength, and concentration.