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The Hanle effect is an effect by a magnetic field on the electromagnetic radiation (EMR) emitted by atoms/molecules within that magnetic field. In contrast, Faraday rotation is an effect caused by a magnetic field on EMR passing through, i.e., subsequent to its emission. The Hanle effect is on the direction and intensity of linear polarization and is of use in determining the direction and strength of the field. The degree of the effect with higher field-strengths flattens, i.e., beyond some limited regime, there is little difference in the effect, the result of this higher-field-strength regime termed the saturated Hanle effect.