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Textbook Expert
Textbook ExpertVerified Tutor
15 Jan 2022

Given information

Given that

Two lense having focus length of and are kept in contact.

Step-by-step explanation

Step 1.

When the two lenses are kept in contact, the negative of the image of the first lens is the object distance for the second lens.

We know,

the focal length of a lense id given as,

 

where,

is the focal length of the lens

is the object's distance from the pole of the lens.

is the image distance from the pole of the lens.

 

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