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A mirror and lens (n=1.5), both with focal length f=10cm are separated by a distance d=50cm in air (n=1). An object is place 15cm from the mirror. The upright final image has magnification M1. When this setup is placed in a medium with n=7/6 the magnification becomes M2 |M2/M1|=n, n=? (n can be any number between 1 and 9, inclusively.)

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