3(i)
(a) Refer to the diagram given below. A lens is made of two materials of different refractive indices (μ1, μ2) as shown. If the rays are coming from a distant object, then how many images will be formed?
(b) A glass lens always forms a virtual, erect, and diminished image of an object kept in front of it. Identify the lens.
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(a) The two materials bend the incoming rays by different amounts and produce two focal points. Hence, two images are formed.
(b) Concave lens because irrespective of the position of the object, the image formed by a thin concave (or divergent) lens is always virtual, upright, diminished, and it is situated on the side of the object between the focus and the lens.