A parallel glass slab, of thickness 4 cm, has been made from a glass of refractive index √3 . A ray of light is incident on one face at an angle of incidence of 60°. The lateral shift of the ray, due to refraction, through the slab, is (nearly)
(1) 2.0 cm
(2) 2.3 cm
(3) 2.6 cm
(4) 2.9 cm