"法拉第效应旋光性" can be translated into English as "Faraday effect optical rotation" or more precisely, "Faraday effect-induced optical rotation".
Here, "Faraday effect" refers to the phenomenon discovered by Michael Faraday, where the plane of polarization of light rotates as it passes through a material in the presence of a magnetic field. "Optical rotation" denotes the rotation of the plane of polarized light. Combining these terms accurately conveys the concept of "法拉第效应旋光性" in English.