1. The optical rotation is known to be-81 degrees. 2. Perucca reported that the dyed crystal did exhibit the desired optical rotation . 3. Comparisons of calculated and experimental optical rotation was also used. 4. A non-racemic mixture of two enantiomers will have a net optical rotation . 5. An orthogonal probe beam detects the precession using optical rotation of linearly polarized light. 6. The two differ in their optical rotation but they are identical in other physical properties. 7. The optical rotation is proportional to the concentration of the optically active substances in solution. 8. The rotation of light is measured using a polarimeter and is expressed as the optical rotation . 9. The use of enantiomeric excess has established itself because of its historic ties with optical rotation . 10. In particular, he made use of polarized light and studied optical rotation by various chemicals.