The property, possessed by certain substances, of rotating the plane of
polarization of polarized
light passing through them. This optical rotation is measured by polarimetry.
Optical activity is shown by asymmetric crystals
which have two mirror-image forms – the rotation being to the left
(laevorotatory, l-) or right (dextrorotatory, d-) respectively – and
by compounds with asymmetric molecules showing optical stereoisomers.
Magnetic rotation of the plane of polarizarion is known as Faraday
|Optical activity demonstrated cane-sugar solution
AND OPTICAL PHENOMENA