Optical activity is 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
(levorotatory, l-) or right (dextrorotatory, d-) respectively – and
by compounds with asymmetric molecules showing optical stereoisomers.
Magnetic rotation of the plane of polarization is known as Faraday
|Optical activity demonstrated cane-sugar solution
AND OPTICAL PHENOMENA