Ray Optics · Refraction
An object AB is placed 15 cm on the left of a convex lens P of focal length 10 cm. Another convex lens Q is now placed 15 cm right of lens P. If the focal length of lens Q is 15 cm, the final image is
- (1)virtual, formed at 7.5 cm right of lens Q, with a size bigger than that of AB
- (2)real, formed at 7.5 cm right of lens Q, with a size same as that of AB
- (3)formed at infinity.
- (4)real, formed at 7 cm right of lens Q, with a size smaller than that of AB
We corrected a printing error in the original paper
Source printed option (2) “with a size same than that of AB”.
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See the full 5 Apr 2026, Shift 2 paper
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