As shown in the figure, a ray $$AB$$ of unpolarized light enters from water of refractive index $$n_w=4/3$$ into a medium of refractive index $$n_p=4/\sqrt{3}$$ after passing through a glass plate of refractive index $$n_g=1.5$$ and a layer of water. At a particular incident angle $$i$$ the reflected ray $$CD$$ is polarized in the direction as shown in the figure. The value of $$i$$ (in degrees) is: