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A convex lens of focal length 84 cm is i...

A convex lens of focal length 84 cm is in contact with a concave lens of focal length 12 cm . The power of combination (in diopters) is

A

`25//24`

B

`25//18`

C

`-50//7`

D

`+50//7`

Text Solution

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The correct Answer is:
C
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