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A convex lens of focal length 10 cm is placed in contact with a concave lens of focal length 20 cm. - YouTube
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The above lens has a focal length of 10 cm. The object of height 2 mm is placed at a distance of 5 - YouTube
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a convex lens of focal length 10cm forms a virtual image of an object at 30cm from the lens . the magnification produced will b
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Focal 10cm 2-way Speakers with 8" Under seat Sub "The Sound you need" - Dynamic Sounds Car Audio Installation Advice Centre
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