A ray of light hits a flat glaSS pane at an angle, bends due to refraction when it enters the plate, and bends again when it comes out the other side. As a result, the ray exiting the plate is parallel to the ray entering, but there is a small distance [sl between the two rays. Show that s can be written: cases 3: heme: (1 ~) n2 3min: Where an is the angle of incidence; n is the index of refraction of the glass; and h is the thickness efthe plate. Assume n=1fer air