= Optical activity
<Optical activity> is the ability to rotate the direction of <linear polarization> of transmitted <light>. In an <achiral> <solvent>, the two members of an <enantiomer> pair have equal and opposite <optical rotations> at the same <wavelength>, <temperature> and <concentration>. The measured angle concerns a bulk sample; it is not a geometric rotation of the <molecules>.<Organic Chemistry by John McMurry/5.3 Optical Activity>[McMurry, Organic Chemistry, §5.3, Figure 5.6 and specific-rotation discussion]{ref}
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