Using your collected values for Incidence, and Refraction,, determine the index of refraction for the acrylic from which the Cylindrical Lens is made. (As in experiment 4, assume that the index of refraction for air is equal to 1.0.) n, = 2 Using your collected values for Incidence, and Refraction,, redetermine the index of refraction for the acrylic from which the Cylindrical Lens is made. n, = Is the Law of Refraction the same for light rays going in either direction between the two media? On a separate sheet of paper, make a diagram showing a light ray passing into and out of the Cylindrical Lens. Show the correct angles of incidence and refraction at both surfaces traversed by the ray. Use arrow heads to indicate the direction of propagation of the ray. Now reverse the arrows on the light ray. Show that the new angles of incidence and refraction are still consistent with the Law of Refraction. This is the principle of optical reversibility