A convex lens of focal length 30 cm is placed coaxially in contact with a concave lens of focal length 40 cm. Determine the power of the combination. Will the system be converging or diverging in nature?
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Power of convex lens, Power of concave lens, Power of the combination, Sign of the power of the combination is positive, so the system behave as a convex converging lens.Read more on Sarthaks.com - https://www.sarthaks.com/59510/convex-lens-focal-length-30cm-placed-coaxially-contact-with-concave-lens-focal-length-40cm
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