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Q7. Convex lens of 10 cm focal length is combined with a concave lens of 6 cm focal length. Find the focal length of the combination. 

Physics — Optics, Nature of Light and Optical Instruments — Question 7 of 155

A. 15 cm
B. – 15 cm
C. 30 cm
D. – 30 cm

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Convex lens of 10 cm focal length is combined with a co... | Physics MCQ #7 | Examora | Examora