Consider a hemisphere of radius 20 cm and refractive index 1.5. If H1 and H2 denote the po...

Consider a hemisphere of radius 20 cm and refractive index 1.5. If H1 and H2 denote the positions of the first and second principal points, then show that AH1 = 13.3 cm and that H2 lies on the second surface as shown in Fig. 4.13. Further, show that the focal length is 40 cm.