(a) In Fig 4.18, assume the convex lens to be replaced by a (thin) biconcave lens with |R1| =100 cm, |R2| = 60 cm. Assume n1 = n3 = 1 and n2 = 1.5. Determine the position of the image and draw an approximate ray diagram for u = – 100 cm.
(b) In (a), assume n1 = n3 = 1.5 and n2 = 1.3. Repeat the calculations and draw the ray diagram. What is the qualitative difference between the systems in (a) and (b).
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