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  4. Two convex lenses A and B placed in contact form the image of a distant object at P. If the lens B is moved to the right a little, the image will

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Q. Two convex lenses $A$ and $B$ placed in contact form the image of a distant object at $P$. If the lens $B$ is moved to the right a little, the image willPhysics Question Image

COMEDKCOMEDK 2015Ray Optics and Optical Instruments

Solution:

Power of the system decreases due to separation between the lenses. So, the focal length increases.