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A lens shown in Fig. 6(b).75 is made of ...

A lens shown in Fig. 6(b).75 is made of two different materials. A point object is placed on the principal axis of the lens. How many images will be obtained ?

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As the lens is made of two different materials, it has two refractive indices and hence two different focal lengths. Hence two distinct images will be obtained.
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PRADEEP-RAY OPTICS-Short Answer(b)
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  12. Two thin lenses of power + 3 D and - 1 D are held contact with each ot...

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  16. Prove that mu = (1)/(sin C)' where C is the critical angle.

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