Letter | Published:

Effect of an Alternating Magnetic Field on the Polarisation of the Resonance Radiation of Mercury Vapour

Naturevolume 115page764 (1925) | Download Citation

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Abstract

RECENTLY, A. Ellett (NATURE, December 27, 1924, p. 931) and W. Hanle (Zs. f. Phys., 30, 93, 1924) observed the depolarising effect of a weak magnetic field on resonance radiation. When the intensity of the field was sufficiently small they found, not only partial depolarisation, but also a rotation of the plane of polarisation. This is accounted for, on the classical point of view, by the superposed effect of the Larmor rotation and of the damped vibrations of the oscillator.

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  1. Istituto Fisico dell' Università, Firenze, Italy

    • E. FERMI
    •  & F. RASETTI

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https://doi.org/10.1038/115764b0

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