Spherical Surfaces & Thin Lenses
A lens is made up of 3 different transparent media as shown in figure. A point object O is placed on its axis beyond . How many real images will be obtained on the other side?
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Answer: (d)
- The lens has three parts made of different media, so each part has its own refractive index.
- By lens maker's formula each part has a different focal length.
- Each part forms its own real image of O at a different point.
- So the answer is (d) 3 images.