## angle of optical rotation, $$\alpha$$

https://doi.org/10.1351/goldbook.A00348
angle through which plane polarized light is rotated clockwise, as seen when facing the light source, in passing through an optically active medium.
Source:
Green Book, 2nd ed., p. 33 (https://dev.goldbook.iupac.org/files/pdf/green_book_2ed.pdf)