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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
15 Jan 2022

Given information

Given that two lenses are kept in contact having power and .

Step-by-step explanation

Step 1.

As we know that

the power of a lens is given as

---------------------------(1)

and we know that if two lenses are kept in contact having the focal length as   and , then the combined focal length is given by,

---------------------------(2)

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