Magneto-optik (ohne Zeeman-Effekt)

Abstract

PBOF. SCHTJTZ has ably carried out the task of co-ordinating and discussing the numerous experimental and theoretical researches on magneto-optics published up to the early part of the year 1936. More than half the book is naturally concerned with the Faraday effect. Since the appearance of Voigt's account of magneto-optics in 1916, much experimental and theoretical work has been done, not only on the normal diamagnetic rotation but also on the selective diamagnetio, the paramagnetic and the ferromagnetic rotations, and a convincing account of these topics is given. An interesting summary of various theories of the Faraday effect begins with the classical electron theory and goes up to the quantum-mechanical theories of Rosenfeld for atoms, and of Serber for molecules. The section under the heading of the transverse magnetic double refraction of light directs attention to the Voigt effect, but is particularly devoted to the Cotton-Mouton effect, for Prof. Cotton's powerful electromagnet has enabled him and his collaborators to obtain and measure effects beyond the ken of other observers. It is interesting to note (p. 218) how the measurement of the transverse magnetic double refraction in nitro-benzol can serve as a measure of the efficiency of an electromagnet.