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PhysicsNEET 2025Reflection and refraction, mirror and lens formulae

Ray Optics and Optical Instruments

In a certain camera, a combination of four similar thin convex lenses is arranged axially in contact. Then the power of the combination and the total magnification, in comparison to the power () and magnification () of each lens, will be, respectively:

  1. A. and
  2. B. and
  3. C. and
  4. D. and

Solution

Powers of thin lenses in contact add: . Magnifications multiply: .

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