Then is the Verdet constant for the material.

The Verdet constant for most materials is extremely small and is wavelength dependent.

The Verdet constant is named for him.

The Verdet constant is an optical "constant" that describes the strength of the Faraday effect for a particular material.

The Verdet constant is named after the French physicist Émile Verdet.

The Faraday effect is chromatic (i.e. it depends on wavelength) and therefore the Verdet constant is quite a strong function of wavelength.

Some materials, such as terbium gallium garnet (TGG) have extremely high Verdet constants ( 40 rad T m).

The characteristics that one looks for in a Faraday rotator optic include a high Verdet constant, low absorption coefficient, low non-linear refractive index and high damage threshold.

The highest Verdet constants are found in terbium doped dense flint glasses or in crystals of terbium gallium garnet (TGG).

YIG has a high Verdet constant which results in the Faraday effect, high Q factor in microwave frequencies, low absorption of infrared wavelengths up to 600 nm, and very small linewidth in electron spin resonance.