KERR EFFECT

Principle and Working :
Certain materials under the influence of strong electric field become doubly refractive. The effect known as Kerr effect can be observed in this experiment with nitrobenzene solution.
In the present setup, a small glass container mounted with plate capacitor is filled with liquid. The container is kept between two filters placed at 90°. There will be dark field of view on screen initially but after applying electric field, the field of view brightens, because the light beam becomes elliptically polarised when passed through the birefringent liquid.

Exp-1: To demonstrate the kerr effect in nitrobenzene solution.
Exp-2:To observe brightness on detector depending on voltage applied.
Exp-3: To determine half wave voltage for blue light.
Exp-4:To determine kerr constant.