Question

A convex lens is made up of three different materials as shown in fig(A) and (B). Then how many images do they form?
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Answer 1

Answer:

for 1st one it's 2

2nd one it's 3

Answer 2

A lens made of three different materials of refractive indices say n1, n2, n3. These three materials will have three different refractive indices. Thus for a given object it forms three images.